I also think that EXPRESSING anger toward the person we are angry with often does more harm than good. Even non-alcoholics become defensive when they are the target of anger--and even when, under calmer circumstances, they realize they did wrong.
I'm not saying angry feelings should be bottled-up or swallowed. But sometimes posting here, or confiding in someone else, or journaling, can be a way of acknowledging and releasing the anger so we can (a) have a calm and productive conversation with someone about whatever the problem is--maybe to solve it--when the person is someone with whom we can or need to maintain a good relationship, or (b) work on another way of changing the situation if the person we are angry with is incapable or unwilling to listen to reason.