The old adage pertains to every situation. You don't point your weapon, loaded or not, at anything you don't intend to destroy. Secondly, you better be able to prove self-defense if you do pull that trigger, whether you hit that other person or not.....and if you can't you are going to prison for a while, and you will have a massive defense lawyer bill that will literally break your finances. Same for brandishing a weapon....in most cases you are getting charged. You can shoot a trespasser within your home, but not outside it in most states unless it's in self-defense. Even then, you are likely going to have a trial. Lastly, taking a human life for any reason is going to have a very negative impact to your life mentally, and that's a proven fact. Enough of the tough talk......don't be stupid when it comes to guns and anothers life.
Wyatt Earp's words to his younger brother from experience...you don't ever want to have to kill a man....not ever!