Haha; I like the name "scream room".

I only really get angry at inanimate objects (such as things made of glass that fall, or milk that spills...grrr RAGE!! haha), so I don't think I'd use such a forum much myself. But I could see how it could be useful. To avoid turning member against member, couldn't there simply be a rule against it? At the top of the depression forum, there is a reminder to not write suicidal posts. Couldn't the anger forum have a rule-with a reminder on every page-to respect others on PC and not rage against them? I'd imagine that most people's anger would stem from real life situations anyway...