I don't want this to sound like a personal attack, but I just have to point it out: You're the one engaging in hyperbole and apparent speculation here, while many of the people who say violence does work are citing personal experience in the matter. I honestly don't have enough experience to know who's right and on what specifics (I never even went to public school, much less got bullied there), but the suggestion that shooting up your school is equivalent to defending yourself does not lend a lot of credibility to what you're saying.