Draw, point it at the ground between you and them, recite movie line:
"Are you feeling lucky, punk?"
If they make aggressive gestures or still step towards me menacingly, shoot-to-kill without hesitation.
I'm a law-abiding citizen minding my own business, the bad guys (even most teen thugs) generally have a rap sheet longer than my arm... Who's a jury gonna believe if the assailants are dead, and I'm a father, a husband, and a productive member of society?
Besides, anybody stupid enough to advance on an armed person who has no intention of becoming a victim deserves a new A-hole right between their eyes.
There is a survivalist mentality as written above, and then there is what is called legal justification. Always remember that survivalists are not exempt from prosecution.
When you shoot and kill someone in self defense you have just fulfilled the requirements for first degree (or the highest murder level in your state) intentional homicide. You did intend on shooting them (in self defense), you used a tool that could easily cause death or great bodily harm. You have to invoke the privilege of self defense (justifiable homicide) which makes an illegal act legal.
That sounds easy, but most states require that you only use deadly force in public when you’re at a reasonable risk of death or great bodily harm. Simply put that the laws are trying to hold people accountable who decide to use deadly force as a means to stop a situation that could have been solved other ways. The fact a bad guy has a 20 page long rap sheet wont really help you in trial, since the trial dealing with the justification of you shooting them is going to be based on what happened (not outside information such as past records).
You can believe that you couldn't punch through a wet paper bag, can't outrun a 100 year old in a wheel chair, and that everyone is a ninja warrior. All that is fine and dandy but other people (a jury) might look at you and think that you actually aren't as weak as you think, and that will lead them to thinking you really weren't at risk of death or great bodily harm (again great bodily harm is more then a broken nose).
When the bad guy clearly had a gun, a knife, or something like that it’s more clear cut. Fists only like the OP suggests becomes a disparity of force case. Were the bad guy(s) reasonably capable of causing you death or great bodily harm? You used deadly force against them, and if they were incapable of reasonably causing you death or great bodily harm, you just used deadly force against a non deadly threat. That means jail time in most cases. Again statistics that show criminals carry guns, are black belts in 10 martial art theories, and so on won’t do anything to prove that you are justified. Only what evidence makes it into court will prove that.
Who's a jury gonna believe if the assailants are dead, and I'm a father, a husband, and a productive member of society?
Just to further try to get a point across I have this to say. If the bad guy is dead, it is going to be your testimony vs evidence collected and witness statements. The fact that your a upstanding member of society and that the guy that was killed was a 20 page rap sheet long offender, isn't going to be debated/tried/etc in court. You will be fighting your case against a dead guy that you admit to killing with
intent. You really can't get more serious then that. Your statements will have to paint a picture that shows you acted in a manner that is consistent with what the law requires for self defense. That means if you shoot an unarmed person you better have been at a reasonable risk of being killed or of great bodily harm. Disobeying orders to stay back is not justification to use deadly force.
On a final note I would like to say that there are way to many people on here that are willing to buy and carry a gun, but never actual seek some legal training so you have an idea of what your into if you use your gun. Carrying a firearm and protecting yourself is serious business. Having a survivalist mentality of "kill any threat" might keep you alive, but don't expect to woo over a jury with that mentality. This mentality would be extremely dangerous if it wasn't for the fact that people will often run when faced with the choice of fighting a person with a gun or running away. There simply aren't many circumstances where a criminal will try to stick around and fight after you draw on them.