Granted, there are more nasty communities out there, stay away from the Gentoo Forums, use their wiki, it is gold, but stay away from their forums. You'll get 3rd degree burns even if you are an advanced user.
You nooblet
Worst experience ever was having my head bitten off on the freebsd irc channel by some dude but everyone told me just to ignore the dude as he's the resident grumpy fsck
Sent Theo de Raadt from openbsd mail before expecting a really acid response (guys got a rep for not mincing his words or toning things down to be nice) but hey totally the opposite, seemed like a helluva nice guy.
Like you said peoples questions have been answered before but they can't be bothered searching and then you get those that demand help as if volunteers owe them something. I think a lot of people get gatvol of this and start burning people