Not one of those things were done at VT.
Either way, the students are caged in in mass numbers, practically undefended and totally defenseless themselves, with an armed lunatic somewhere among them.
I think that by the college level, students have reached a state where the possession of personal defense systems ought to be allowed. Cramming all these people into rooms and buildings with few exits, with threats of destroying their lives if they even think about defending themselves no less, is the reason they're targeted most by the one person in a million that invariably goes wrong.