You are absolutely right, When I was in grade school I always liked to watch violent movie i.e. Robo Cob,Predator, Full Metal Jacket ,etc, and now I have very few violent tendinces. The difference is that my parents, where really being parent's and tought me the difference between right and wrong. If I ever did anything like take a gun to school or any bullshit like that, I would want the police to arrest and put me in prison, because it would be easier that if my parents got a hold me after pulling a stunt like that.