As far as I understand it, the wealthier the area the more likely there are guns on-site. You also need to be home to use them, a booby trap will get you roaste

As far as I understand it, the wealthier the area the more likely there are guns on-site. You also need to be home to use them, a booby trap will get you roasted by the law. So the cameras let the burglar see that no one is around to shoot them.