I think anger is useful to initiate change. It can lead us to take appropriate action during times of fear or overwhelm. It gives a sense of certainty. The problem is that the raw emotion of anger can override rational thought if left unchecked. I recently learned that a child I knew was in a situation of abuse. That pissed me off so bad. No child deserves abuse. I became angry, I took action and I did not back down until the situation was changed. I feel zero guilt.