It's basically just a bunch of socially awkward (pre)teens who run around posting their dumb crap because this is the only place that wants to hear it. They go around "trolling", while having a mindset of "hee hee hee im making everyone mad" while they're probably just giggling to themselves over nothing. These are usually the same people who believe the internet was invented just for them to run around and "troll" each other, and when one someone mildly intelligent comes along and tells them they are handicapped, they respond with things such as: "It's called the internet, get used to it."
The forums are full of idiots who run around making 'lulz commentz'
1 in off topic, while yelling at each other over things they know almost nothing about. Instead of posting contributive comments, a majority of the members just scan topics looking for stupid things to point out or comment on, usually spelling errors, grammar errors, or random youtube links related to only one word someone said, even though alot of posts consist of only one word anyway.
Majority of topic responses consist of at least one handicapped emote, whether is be this one:

or
:c c: :3 XD :D ;D :P :[ >:( o-o <_< or 0____-___-_____-_-______)0
Pretty much sums up majority of forum activity, except for the occasional intelligent poster or good topic.
1Crappy jokes based around crappy things, IE: Dumb youtube videos, crappy games, or a common misconception of some figurehead.