Whenever I've visited /prog on 4chan I'll see posts with some intelligent content then about 10 replies saying "your a fag" or something then maybe a couple of other genuinely witty replies and a few intelligent ones.

There are also entire threads started on seemingly legit topics that devolve into flamewars almost immediately plus a huge number of people who seem to just spam some meme everywhere regardless or relevance.

I'm quite surprised that the intelligent people there put up with all the other crap. I suppose it's possible there are a lot of intelligent people with the emotional maturity of a 10 year old.