It's not criminals that are doing the shootings, it's our own kids who have easy access to guns. Criminals in this country have aren't the ones doing it. They much rather kill one person at a time which has been happening since dawn of time. But school shootings are a thing created by easy access to guns here in America now. What intruders are you talking about. This isn't Wild West, get over yourself. Just install alarms and keep your door locked. If you keep a gun and are in a bad situation 9/10 times you won't even be able to use it. Are you keeping a loaded gun next to your bed? Give me a break.