It is not our job. This is a service to society. When more individuals become better, healthier, more wholesome, then society becomes better, healthier, more whole-some. So if someone feels that they had better serve in this way, I can t stop him or her. It is the decision of each individual how best to serve others.
Nobody is pardoned.
Dhamma is the law par excellence. They should be pardoned because it is in your own interest. If somebody has done something that has hurt or harmed you, and you have animosity towards this person, you have started harming yourself. So to save yourself from that harm, it is better to forgive and forget. This is in your own interest.