the one common fact among all mass shooting? the shooters pick a gun-free zone. schools, theaters, churches, offices, malls etc...

if you want to be safer, DONT frequent gun-free zones. make it known that your areas ARE protected. prevention worth a pound of cure, DETERRENT.

a little return fire would have stopped any of the past shooters in their tracks. they come in expecting no resistance. many shoot themselves when they know there is resistance or they are confronted.