Let him go; he's learnt his lesson
From Create Your Own Story
You shake your head, part out of sadness, partly out of anger, as you push him back into the mud, sending him sprawling.
"I don't want to see or hear about you, or any of your friends ever again. Do you understand?" The boy nods eagerly, almost sobbing. You pick up your pack and head off, content that the situation has been dealt with.