The fallacy your feeble mind has created is that minimally trained teachers will go commando. What else is going to happen? (And BTW, what are next week's winning lotto numbers?) Will first-day mountaineers attempt Everest? Will first-year nursing students attempt brain surgery? In the end, people will do what they feel capable of doing. You must wonder how mass shooters kill anyone, for the lack of training they've had. Do you know of any good mass shooting classes?