Is ignoring someone who hurt you the best offensive weapon?

It’s an open question for discussion, not something specific.

If someone really hurt you in some way, hurt your feelings very badly. Is ignoring this person the most lethal weapon to fight back and move on? Never refer to him ever again, like he is nobody for you from now and for the rest of your life.

Did you do that?
What were the consequences of this behavior?
Did the other side learn his lesson or not?

Unfortunately, I find it works. This kind of punishment for worked for me. After all, there are people I do not want in my life, no matter how much they will try to get back, and this is the way to show them the door out. And even if they make faces when they’re near me, as if offended, it will not change my inner sense, I did the right thing.