Few kinds of idiots that destroy any forum discussion

Sometimes the cropping makes a difference.

The situation: you're in the real world, talking about something, and then some idiot comes in and throws random trivia in the talk. This attracts other idiots who start to argue about stuff right between the lines of the main conversation, and you are left with them and try to wait until the flame war dies out (preferably with those who started it). But no. Some smart guy once said that there are only few idiots in the world, but they're scattered around so cunningly you'll run into them almost always.
Now, let's see what happens if those idiots finally learn how to use a computer and the Internet.

The Trivia Idiot

Trivia Idiot's favourite part of a beer.

The kind of moron that always wants to throw in some trivia. If you meet him anywhere on the Internet, be warned - they will continue until they run out of their trivia. Are you discussing HTML being American? Beware, because some idiot may come and say that it was invented by the guy noone on 4chan gives a flying fuck about. And surely people would point out that they were discussing that it's in American as a language, right? OK, did you know that you just made the worst mistake this forum thread has witnessed? Well, you now know...

The Anti-Trivia Idiot

This is the Trivia Idiot's nemesis, an idiot that would try to publicly dismiss anything however useful the Trivia Idiot had ever said, never looking at the trail of wrecked forum posts. They always come together, in pairs. Sometimes they make that stupid mistake that they sign up to many forums under the same username - and that's how you'll know that the flame war will carry on and on and on...

The Brainless Idiot

You meet them mostly on WoW or any other brainless idiots farms. Brainless idiots have a brain, but the size of their ballsack, and located in that exact spot. Of course, if a Brainless is a female, the brain would be shrunk to the size of a walnut, with all the parts concentrated on tasks such as "purposeful textual massacre" and/or "what mascara?". In the forums, they manifest themselves by posting totally off the topic and using cryptic Facebook lingo ("so i waz on teh town n i gt hit by a bus looool"). Fortunately, they're unlikely to engage in a flame war when ignored. So, all you need to know to fight them is here:

Also useful when your bitchy sister/daughter gets drunk and then pregnant.
Or when another iPhone is released.

But Remember

I'm talking about idiots here. Not trolls. Well, trolls are worse, because they do all the stuff they do on purpose. And the purpose is maximal annoyance of everybody else.

Pics used in this article:
http://simianuprising.com/tom/ and http://www.flickr.com/photos/raeallen/69592985/