I have never experienced this in any other gaming community.
I wish I could say the same! Every game I've ever played has seen the whiners hitting the forums every 30 seconds whilst the rest of the population just quietly enjoy the game.

With every game I've played, you'd think the sky was falling by reading the forums, and if anybody dares try to bring some sanity to the discussion, they're dismissed as fanboys.

The WoW community isn't any different in that regard.