Many people think that, Austin, but can you point to a case where it has happened? Can it happen? Sure it could. However, most crimes are to gain something, not hurt someone. Criminals generally want stuff and would rather threaten unarmed people and leave safely with money and/or valuables, or steal them when nobody is around. It's the same reason we put the ADT sign in the yard, and have a blinking alarm light on the dash. Do you train your dogs to hide and not bark when an intruder comes? No, of course not. Barking dogs are a proven deterrent. If, however, someone is determined to harm people, they might look for someone with a gun to take out first, but historically, they are just seek out gun-free zones and shoot up defenseless people. If they had guts, they'd man up and earn a living the right way.