I can think of only 2 reasons why a round is ever fired in my gun. 1 is for practice (i.e. at the range) and 2 is to shoot another human being (assuming we're not putting ourselves in situations to have to defend against wild animals). If I do not feel that someone poses a big enough threat to me, my family or friends, or society at large, and I don't feel like I am justified in using deadly force, then I have no problem with swallowing my pride and letting them get away. Their time will come soon enough. I think Johnny Cash said it best when he said "You can run on for a long time...sooner or later gotta cut you down."