To those who say "once I decide it's necessary to pull my gun, I am going to use it". That's nonsense, and apparently you never faced down an opponent or opponents who were armed and "may" have had the intent to rob you with a weapon, "real or fake" . You pull your gun with the intent to shoot the guy, as you do this, he throws his gun down and runs away, or just takes off. Are you still going to shoot him? I would hope not. This happens every day in this world of ours, People get hopped up, or drunk, and decide to commit a robbery, maybe they are new at it, of just need a few friends along, or drugs, to give then courage. If the gun comes up or even starts to come my way I would tack him to the wall, but if he drops the gun, "which I have seen", or just freaks out and runs off, are you somehow duty bound to think you may execute them? that's why they probably did what they did in amending the law, also firing a shot in the grass in front of his foot, may give him immediate cause to rethink his bright idea.
If you have a gun pointed in your direction or at you, it's up to you to decide what you do next, do you shoot, give up your cash hoping that's all they want, it's subjective, and different for everyone in every situation, but at least this gives you another alternative to stop something that you "if you are aware" see is going to take place any second.
How many times I have seen someone being closed in on by a pair or trio of jerks who are about to separate them from their belongings, at least you now have the ability to put your hand on your gun, and say look whatever you are thinking isn't going to happen today, walk away, or simply turn around with your gun at your side and make sure they see it. Isn't that better than having to shoot someone that you knew was going to try to rob you?
It's not worth the physical, mental or monetary, strain to shoot another human being unless you have no other choice, it's going to make your life miserable and change it forever if you do have to do this even if justified. You will probably have to move change your phone number take your kids out of school, it's a nightmare. Much easier if you can get out of doing it by showing your hardware or making a warning shot dismiss the threat.
Not for a second am I saying that if you have to shoot then shoot. You will know, that voice inside you will tell you.
If the need for deadly force, ceases when you draw your gun, then it's unlawful to shoot.
You won't know this until your gun is presented.
A couple of our Moderators discuss that here,
http://www.thehighroad.org/showthread.php?t=731200.