Protect you from what exactly? A crazed lunatic coming to hurt your family? How realistic is this situation exactly? I imagine the most likely situation they

Protect you from what exactly? A crazed lunatic coming to hurt your family? How realistic is this situation exactly? I imagine the most likely situation they would be used in defence is for home robberies. The safest thing to do when being robbed is let them have whatever they want. You would be an idiot if you added a gun into the equation and blood started being shed.