Because of the thread about Sandy Hook, I'm going to keep my mouth shut.
However, this BS is all over. If I defend myself from someone, I will get suspended. If I am being started on, and I take matters into my own hands. I will get suspended. And as with all these cases, young people do not understand the effects of words and how they translate into actions. Because this is what happens, some kids start a fight with another group of kids, it escalates, and now there are guns being pointed at people with intent to kill.
The student in question saved a life, possibly several. But the result is the same. Schools do not approach or deal with these instances, and as a result, people get hurt. If just one person had intervened and made an effort, most of these "school shootings", attempted or otherwise, wouldn't happen.