In my experience: Hurt them once, they move on. (I was picked on a lot when young (I was freakishly tall for my age, like 8-12 inches taller than anyone else)). I had several prolonged bullying experiences finally curtailed by eventual violence in the end. I usually got in trouble for it too. I have no clue today if they did. I do know: they stopped.

Bullying isn't about you to the bully. Its about them, and picking on someone. The someone isn't that important, and when you become the someone who is more expensive to screw with, they leave you alone usually.

(And I think this sort of thing as an adult is stupid and a good way to go to jail, but at 10, it works fine).