posted by gut
I'm just challenging the idea that arming teacher is going to be a significant deterrent. The most effective thing that can be done is lock schools down and be vigilant about who you let in the building.
Do we really want to trust these people with guns when they can't even monitor/control who has access to their campus?
I agree with this. Seems to be the easiest approach to preventing school shootings at least. Crazy that you even make this calculus but you're probably rather mass shooters go to other places than schools and the easiest way to encourage them to do so would be making it harder to get in the front door of buildings which, by and large and pretty much brick behemoths in any case.
How many private businesses require you to have a key card to get up and down an elevator, inside a door, etc. while people can walk in and out of my old high school like it's nothing...
If we arm teachers en masse - even if they are highly competent accidental gun deaths would soon surpass mass shooting deaths in schools just because of bad luck - if I were to guess.