What if the BG tries to leave nicely?
Let's say you find a BG in your house during the day so there is plenty of light. Not only was he was not expecting you, he was not expecting you with a gun. So let's say he is really smart and the conversation goes like this:
You: Stop! Hands in the air!
You: On the ground, NOW!
BG: No. I am going to just leave very slowly.
He then proceeds to keep his hands fully extended in the air making a very big V with his arms, turns his back to you and starts to proceed to the front door, all the time keeping his arms in that big V. At no time does he make a threatening motion. As he gets to the front door, he says:
BG: I am going to lower my right hand and open the door. Then I am going to leave.
I have never heard of a BG doing this, but what would you do? He obviously knows where you live and knows you have guns. You can't justify shooting him in the back, but if you let him go, he most probably will return with buddies. You don't want to physically confront him. So what are the options?