Hmm...interesting topic. This would've made exellent Political Corner Material. Nice job FoR, and damn you for beating me to it. ;p
Anyway, on topic. First off, I think the true effectiveness of Anger Management courses is near nil, and I think the cost and resources of setting up such a course would be wasted. You could simply incorporate a unit in a health course, and the education problem will be solved.
Secondly, I think the idea of installing security is not the best idea. The cost is too high, and if you think about it, the number of school shootings, although a very shocking number, is not terribly high.
Parenting is partially responsible for school shootings, but nowadays, there is little parents can do to get the truth about a kid's day at school. In short, children are getting more independence, which I think is good.
The only way I see to totally eliminate (or at least drastically reduce) school shootings is to make sure kids can't get their hands on guns. And the only way to make sure kids don't get guns is to make sure their families don't have guns, because a kid can find anything in the house. And the only way to make sure kids can't get guns elsewhere is to close gun-shops. Granted, easier said than done, and there is a certain amendment in the Bill of Rights which prohibits the government from doing what I'm proposing.
Anyway, I think that school shootings aren't going away anytime soon, and I have yet to see an idea that truly has any value. Everything here is mere idle speculation. I think the problem with school shootings lies deeply in the American culture. Violence is already embedded into the minds of every American. In the country, people are murdered everyday, outside, the U.S. employs her military to get things done for her. But that's another debate.
All I'm saying is that right now, there is little we can truly do, unless there is some serious legislation on gun control, or the NRA dies.
Now, to address the topic of whether or not those bullies deserved to be killed. In my opinion, no one deserves to be killed unless they killed another. Either that, or they pose a serious threat to something else. (A broad definition, I know, but by a serious threat, I mean treason.) Some of you mentioned a Babylonian law, an eye for an eye. Well, if you think about it, killing someone just because they bully you is certainly not an eye for an eye. However, I think that concept does apply to dealing with bullies. Let's face it. In today's schools, we have to be vigilantes and take matters into our own hands. Teachers simply can not deal with bulliying. It's not possible, despite a few minor "victories". So, my advice is, if you are being bullied, form your own gang and bully them back. If your alone, and they attack you, hit them back. But keep in mind, do so only when it is to your advantage. It is sad, but in order to deal with bullies, you have to sink to their level. To think you could beat them in a more...shall we say innocent way, is idealistic and naive.
I still firmly believe we need to attack school shootings at it's root; the weapons. Granted, we also need to do teach students about violence, etc. But such methods have only minimal success rates, and can serve only as back-up programs and suppliments.