What we do, as writers, is give a piece of our soul to the reader, or at least we should strive for this. We tell stories that need to be told. We say things that need to be said, even if it is not popular or politically correct.
Anger is very destructive and like Bryan points out, it can lead down a long and dangerous road to depression, isolation, and distress. Recognizing your anger and how you feel is the first step and dealing with it is the next.