Which house would YOU rob?
They can protect you from idiots. Burglar calls police to report that homeowner was threatening him with a gun. The owner could have improved the gene pool by pulling the trigger, but I suppose that would have been unsporting.
Here is another:
Man holds 2 accused of road rage at gunpoint. So far he is not in trouble
http://www.channel3000.com/news/Man-holds-2-accused-of-road-rage-at-gunpoint/-/1648/17676830/-/4xxclcz/-/index.html