I left WoW, but it was never nearly this bad, though it was always in the lower half of MMOs when it came to assholishness. (Guild Wars is the worst I've seen, and oh boy, it was bad.) You can choose with whom to play, silence channels, etc. That said: one of the reasons I left WoW is that it's gotten a lot worse in recent years, socially, than it used to be. When I started to play, I could be in general chat, and pretty much count on the most annoying thing there being Chuck Norris jokes. By the time I left, I couldn't be in any chat that wasn't private, not even trade.

I always avoid youtube comments because there is nearly always something horrifically bad in them. I saw people throwing racist, homophobic, misogynist, and I don't even know what slurs on a Debussy flute piece playing over a nice picture.