And this is all discussing situations where there is an actual active shooter. More or less unmentioned in this conversation thus far is the potential for an armed citizen to attempt to stop an active shooter when one doesn't exist. A school was put on lockdown the other day because four kids were playing with a long umbrella. What happens when an armed citizen sees something like that and decides to draw? Is the inevitable accidental shooting acceptable collateral damage for your right to pretend like there's still a gold rush out west?
Cops shoot people whom they think are armed, and it turns out they're holding a soda can. Cops. Trained professionals. No way I want some guy with an itchy trigger finger pulling a weapon on someone who isn't doing anything wrong.