I don't think so. If you are carrying a weapon or have one readily available you had better be prepared to use it. If you can't for whatever reason shoot another person then you should not have a gun for self defense. I have taken several firearms training courses and all of them have a similar messages, one of them being "no warning shots", ever. You either fear for your life or you don't, there is no gray area here. Before you even pull your weapon from it's holster you should already have decided you are going to shoot...if not, leave it in the holster.
In addition the last thing you want is a bunch of bullets flying around, talk about irresponsible. What if you kill an innocent bystander? You are going to jail.