[Porsche-O-Phile]

The core problem is that we as a society reward it. The bully kids of today end up becoming enabled and turning into the brash, loudmouth, aggressive "macho" type adults of tomorrow who simply deal with situations and people by intimidation, shouting, confrontational behavior, etc. Nobody deters it in the adult world (in fact it's often rewarded) and I'm guessing a lot of kids see it and simply learn from it/emulate behavior, quickly figuring out it's better to be "on top" than "on the bottom" since nobody else is going to intervene on their behalf.