I think it's Forum life in general. I use a Hill walking site, and it just as bad on that. Folks offering to fight other people, iv'e climbed better mountains than you, you use a crap rucksac, blah, blah, blah.
I try and stay out of it all, although it's hard when your on the receiving end of it. What i can't understand is, why can't people just accept what other posters say at face value and not get wound up by it. Sometimes the joke/banter is so obviously a pi** take, but they still rise to it.
I'm fairly new on this site, but iv'e already worked out who some of these people are.