Well, reality is that people break in because they're desperate and in need. This doesn't mean 100% of the time they will be violent. I would say the majority of them will try to run once they are caught trying to break into the home. As for being a Christian, we want to shoot these people in need? What does the bible say about when our enemies take from us? Give.
The word is out in a community that a certain man has money in his home and those who are addicted to drugs will do what ever it takes to get that money.
Yes, some do run away once the lights come on and the dog barks.....but that is not the ones we have to be warry of.