I dunno, I frequent a few other boards of different music.
Hip hop, drum and bass, dubstep, minimal, and I don`t see it so much.
I see critique, but people seem to be less prone to throwing their toys out the pram when critised in my experience.
They tend to understand critisism more and take it on board.

As for just plain slagging, yeah there`s loads of that.
Trance people slag house.
Dubstep slag jump up.
Drum and bass slag house.
Techno people slag trance.
etc

basic tribalism.
no more or less pathetic than people arguing over teams of men kicking a bag of wind around a large grassy area.