Don't take this personally, I think you would be surprised that suicide bombers are not deterred by the idea of death. Yes, they would still go to schools with police, adaptation and evolution would dictate that, and even move onto places such as churches or malls. And yes, planned death without a hierarchy from a superior telling what to do, is by far, a lot worse than someone who is confused with their identity reading books. Finally not being able to deter a shooting because of unpredictability is not the root of the problem.