I went through some of the same verbal and mental abuse when I was a kid. Believe me it leaves scars... I have trouble trusting anyone. I'm a cynic always assuming the worst in people. Anyway, what I'm saying is they may claim it's just a prank bro, lighten up, take a joke... Yeah it's a joke but not the kind you're thinking. You physically over power him, mentally traumatize him, and emotionally drain him then you wonder why he's weird or starts to act out. Why do some people cut. It's a form of control. If I'm already hurting or IO'm already going to get yelled at then I'll get yelled or hurt for something i actually did. If you hit someone with the consequences of bad behavior then there is nothing to stop them from developing those behaviors. I guess what I'm saying is this MASSIVELY dysfunctional and abusive family, in my entirely un-professional opinion, is destroying his innocence and warping this poor child. Again I'm no psychologist or therapist just someone who has clawed his way out of this mess all be it mine abuse was private...