Conflict is the basis of drama. I guess that goes back as long as time has existed as far as mankind is concerned, dating back to the Greek tragedies or the Old Testament. And violence is a form of conflict, so whether that's catharsis or whether that has some socially damaging effect on audiences - I suppose that would just depend.
Clint EastwoodNobody looks like they did when they were 20, so why not take advantage of the fact that you're changing, emotionally as well as physically?
Clint Eastwood