I thought it was a meme. I think it's hilarious that you guys actually think arming teachers is a sane solution.

That's true. Big time.

And it's not just the deterrence (incentives-wise), but the filtering (skin in the game -wise). With a system that sufficiently deters criminal shootings, it will be the case that those it does not deter end up weeded out of the gene pool, and what's left is the evolutionary adapted reality, where those that "need to be deterred" simple don't exist anymore.
Oh boy... You could also have healthcare programs that help kids with antisocial personality disorders, but I guess you could also just bust a cap in Timmy's ass if he acts up. A++
murica.