...I guess my thing is... I won't believe anything is totally impossible to do something about. I won't give up without trying. Trying might at least do something, even if it doesn't totally solve the problem.

And that's especially true for people like this, because just leaving it alone will make it worse. Whether I do or don't forgive them doesn't affect them. So they'll learn that they can do that kind of thing and nothing will happen, and they'll have even less hesitation about doing it than before.