I feel your pain. I'm 12 and I'm hearing '"forget you! This Is my sharpener now!"' Also seeing other kids getting punched, slapped, elbowed, kneed for a simple misunderstanding of who was In front of who in the lunch line.
It's sad really. I'm short tempered and even I would not go as far as to punch someone.
Edit: Yes I know I'm also a child but still when I bump in to one kid on accident the person huffs up his chest and says '"You wanna black eye?"' I just say sorry scurry away.