Anger is an emotion that can fit in to many forums. I think it is a good idea to look where and what your anger is about. For example you might be angry because you were abused therefore it would be good to talk about the anger in the 'Survivors of Abuse' Forum. Or you might be angry because of depression in which case you could talk about it in the 'Depression' forum. In my opinion anger can be a healthy emotion and can be expressed here in many forums.

A full on 'Anger' forum would not be appropriate on a support forum but there are places it can be expressed.

Hope this helps.