There were plenty of ex-military and guard students when I went to randog U. They'd make great deputies, and give them a tuition break for carrying.
That (prior experience) could be considered a safeguard IMO. I was thinking more along the lines of evening activities (wink) where accidents and foolish behavior are more likely to happen. There is no legitimate excuse for everyone to be unable to defend themselves. This has happened before (on a smaller scale) and it will unfortunately happen again. The disarmed student and faculty idea needs to be rethought.