It's very complicated, and I can say first-hand that it can do permanent damage to a kid who is bullied. I was bullied as badly as anyone can be, and I still have issues from it. Bullies aren't evil, but they have no clue just how much damage they do. The bully victim would be better off getting his/her face slashed once, than to be bullied year after year. It's that bad! Take it from a nerd with high-functioning autism.
Charles