The first and most important thing you need to know about troll detection is that, at least on Datalounge, a lot of it is personal opinion. There's no hard and fast rule you can use to identify a sockpuppet, and often no easy way to really identify a troll, either. Further, someone you consider a troll may not be considered a troll by anyone else.
Still, here are some tips, all personal experience and/or opinion.
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Common Troll Topics:
1. Anything about "the woke" or "SJWs," i.e. "Waah, the woke broke my dick and stole all my socks!"
2. Race-bait topics of the type that were featured in Breitbart under the "black crime" tag. Similarly, threads like "When did Spring Break get so black?" and "Black People Smell" will seem like obvious troll threads to nearly anyone reading this; however, they frequently receive replies from forum members who, unfortunately, cannot easily recognize trolling.
3. "Everything is awful and we should all just kill ourselves about it."
4. "Please see all 15 threads I have posted today about horrible crimes committed against babies, animals, and baby animals."
5. Trans persons, the Sussexes, MRA topics, hating on lesbians, black actresses with opinions, autism.
6. The underwhelming threads. If you've seen it, you know exactly what I'm talking about.
7. "I did something sexist/racist/homophobic at work, and it was unfair."
8. "Here's something some nobody on social media said, and you should be mad about it."
Sockpuppets: Again, there is no easy way to detect a sockpuppet. It's based entirely on your own observation, and because Datalounge deletes threads regularly, there's often no proof left that the trolling or sockpuppeting happened.
It's important to note that some people may have sockpuppets for innocent, or at least non-nefarious, reasons. Maybe someone is just really fond of "Knight Rider" and has a few different accounts they use to get the discussion going. That's really not trolling; or, more accurately, it's "trolling" in the Datalounge-specific colloquial sense. Years ago, anyone who had a rather odd obsession or knowledge set and who posted about it a lot was called a "troll," and not in a negative way. These days, we have both regular internet trolls and a few Datalounge "trolls."
Another example of a non-harmful sockpuppet would be someone who has a specific character they play as part of the "collaborative fiction" aspect of the board, and they don't do anything particularly harmful with it. Again, this is a matter of opinion. Do they like to post about a certain Z-list actor a lot, and keep it to one thread? Or do they post constantly about a celebrity they hate, with multiple threads a day and while using a series of accounts?
Someone might want to have one account for discussion and a second one for the porn threads, or one for religious topics and one for everything else. Maybe they have one login at work and one at home.
Also, it bears mentioning that sometimes people are just jerks and not truly trolls. Sometimes someone who doubles down, triples down, quadruples down on a mistake and starts shouting all manner of insults is just embarrassed and kind of pathetic, rather than a troll.
Troll Examples:
The following are a few examples that I personally have run into on Datalounge, but ultimately, the verdict on whether someone is a troll and/or sockpuppet or not is going to be your opinion, rather than something you can factually prove.
- In the middle of a conversation, someone posts with one account, then replies with a different account.
- Similar to the above: In one instance, someone mentioned they couldn't link to the Miami Herald, apparently for technical reasons. I suggested they link to a Tweet with the article in it instead. For unexplained reasons, someone jumped into the conversation, throwing around insults at both of us. No one responded, and I put them on ignore. About 15 minutes later, a second person showed up, saying the same nasty things about everyone. I ignored them. Then a third person, then a fourth person, all doing the same thing. My judgement in this instance was that all four were the same person using multiple accounts, trying to get attention, upset because no one had responded. However, this is a good example of something that looks like a troll, but cannot be proven. You're using judgement in this case to decide.
- Sussex Trolls use multiple accounts regularly, often using one to post slurs, and secondary accounts to defend the slurs. In one case, someone was outed as using sockpuppets because they kept spelling Harry's name as "Herry" with every account they had.
- One of our more notorious trolls would come up with very specific phrases containing multiple slurs. He was identified, in fact, because he used to post one specific slur all over the internet: "cracker breeder goyim," which appeared on Reddit, Queerty, JoeMyGod, Towleroad, DListed, the IMDb boards, various websites that used Disqus for comments, Facebook, and of course, Datalounge. This was the troll's favorite phrase about five years ago, and over time, his replies have been deleted, for obvious reasons. However, he continues to invent new slur phrases and use them constantly with all of his accounts, making it easy to identify his sockpuppets.
- If a bunch of threads all on the exact same topic get posted and/or bumped at the same time, it could very likely be sockpuppets.
- A couple of years ago, an angry troll spammed Datalounge with about 50 threads about poop posted over the course of maybe five minutes total. Each of the threads was started by a separate account, making it nearly impossible to ignore them all. This was the first real evidence we had that there was a single person behind dozens of sockpuppet accounts. I kept several of those accounts on ignore, including one account with a redname that they (probably mistakenly) used. None of these sockpuppets were banned, and they're still being used. Because the threads were deleted, there's no way to prove anything.
- Someone trolls at length until they finally say something they can't troll their way out of. They disappear, and within moments, a second person shows up to start making the same arguments as the first person did. Congratulations, you just spotted someone using sockpuppets.
- Posting topics that are meant to give trolls a place to troll. This is often called "trollbait." Someone will post a perfectly good article from a real, verified news source, but the first few responses will be troll responses. Say someone posts an article from WaPo about the increase in hurricanes in recent years, but you notice that within one or two minutes at most, another person has replied with fake news sources or rants and raves about how climate change isn't real. You've probably run into a case of one person being both the OP of the thread and the sockpuppets who use the topic as a chance to spread misinformation.
- Playing both sides. Here's someone who used slurs, and then later with the same account, complained about the use of those same slurs.
Trolls Use Distractions:
The goal of a lot of trolls is simply to disrupt. They don't just want to irritate people, they want their threads to gain prominence while others' threads languish or are ignored. Some examples:
- Pretending to make mistakes or get confused. This is a common one on Datalounge. I cannot count the number of times I have replied to someone who I thought was simply mistaken, only to find out they had been lying and hoping that someone would respond so they could try to start a flamewar, or lying about something that they hoped no one would bother to correct.
- Falsely claiming there's already a thread, or that the link in the OP doesn't work, or that something has been debunked when it hasn't been. This is related to fake "mistakes" or "confusion," really. If someone says "Already a thread" but doesn't link to it or at least give the subject line, look for yourself. You'll find a lot of these claims are lies.
- Deliberately killing a new thread before it can get started. If someone shows up very quickly in a thread, starts hurling insults that don't seem to make much sense, and the thread suddenly goes gray, you can bet that the insult-hurler is a troll who has used sockpuppets to FF the thread to get rid of it.
- If you make a typo or a mistake, and they pounce on it with excessive insults while ignoring the content of your comment.
- Pretending you accused them of something you never did.
- Alternately, accusing you of something that you hadn't done. Frequently, they will accuse you of something no one has actually done.
- Claiming that something specific was not posted, written, or said, when it's easily available and right there for all to read.
- Posting repeat topics. You'll find that a lot of people do nothing but post things that have already been posted before, and which have active threads.
Karma Farming:
As mentioned, DL uses a "karma" system to determine who can and can't post or moderate (i.e. WW or FF) a user or thread. It's explained in the FAQ under "Why can't I post?"
Good "karma" is essential for a troll to be able to troll. Because of this, they do what is often called "mining for karma" or "karma farming," i.e. posting topics and replies designed to get them WWs which will increase their karma.
This is often why we have the same topics posted repeatedly: 1980s night-time soaps, Golden Girls, historical unsolved cases, Karen Carpenter, Lucille Ball, budgets, retirement, what are you having for dinner, etc. Also, if a new topic takes off, like the topic of Gwyneth Paltrow recently, you will see people taking single comments or observations from Paltrow threads and making new threads out of them, for several days, until the topic dies down.
That's not to say any thread on these topics is a troll thread. Again, this is going to involve judgement on your part. However, if you see someone posting repeatedly about The Golden Girls who is also posting obvious troll comments, you've probably found someone who is hoping to get enough WWs from Golden Girls comments that it will offset FFs they get from trolling.
This is hardly an exhaustive list. I don't want an exhaustive list, do you? No. Nobody does.
Trolling comes and goes in waves, dependent on whether it's Primetime, or whether the one guy who checks in on Datalounge once a month has decided to ban a troll or two, and that troll needs to wait the two weeks before they can post. That said, they mostly seem to just pay to troll now, which doesn't bode well for the forum.