When forgiveness is a bad idea.

We are told that to forgive is a good almost divine thing but I have come to think that in most cases it is a bad idea. While ignoring accidental or unintended actions can be uplifting for the soul simply forgiving intentional misdeeds is tantamount giving the perpetrator permission to do it again. I can not accept the concept that harmful acts should simply be shrugged off as "life Lessons". I believe that the lesson we are meant to learn is to act to protect possible future victims rather than to simply forgive and forget. I am not advocating harsh punishments so much as I recommending preventive interventions.