Computing/IT attracts people on the autistic spectrum (I'm one) some of whom find it very hard to understand how anybody could possibly think differently than themselves (I'm not usually one of these). It's becoming clear that autism is about as common as left-handedness - just not always as extremely presented. You don't have to be like Rain Man to be autistic.
I've had my share of negative forum experiences (perlmonks for example) but I perservered and got a decent answer in the end, after having shown that I hadn't just dropped my problem on the forum without RTFMing, RTFMLing and RTFGing first! I also remember having called someone out on their unhelpful attitude, and eventually they provided the best answer!