Or an actual screening system and regular review of this nasty creature's mental state? Just how many times has this happened before - in the same setting, a college, before? Would they allow such a gun possession solution in Australia?
We have had several such incidents here, Strathfield, Hoddle Street, Port Arthur, Monash

The fact that you asked the question proves you have, as usual, done no background on the subject before opening your yap.

Go read up and then come back and talk to me. I am not here to educate you
Instead of taking the lazy way out and not simply checking up on people every once and a while, how about give a damn about your neighbor, in your suburb or in your dorm?
Like Joe Horn did? That works for me.

Oh and Eyelids