Honestly, you have to decide beforehand that your intention is to go home to your family and not be out to teach an idiot a lesson, otherwise you will have to deal with the fact that even the wolves in the neighborhoods have kids running around there and I never want to be the guy that shot and killed someones dad no matter how deserving of it he was. I always resort to giving the moron a chance to decide wether or not he is about to get shot, and so far they turned out to make positive life choices.

I hope I never have to see the other side of that...
I had several years of doing anywhere from 6-10 two full day training sessions a year with VATA Group, when they still did civilian training sessions, from entry level all the way through advanced and Level III, and into what they would call "workshop weekends" where they know you have the handling skills and they don't have to babysit you, so you can focus on seriously running guns hard for 2 straight days at the SWAT/DEA training facility at Camp Villuere in LA. By that time you are running in and around vehicles, buildings, rooms and all manner of obstacles.
Right/left handed, and off shoulder (shooting right handed on your left shoulder behind cover so you don't expose yourself) with AR's and pistols.
I was never anything special out there, they were constantly pushing you beyond your comfort zone where you likely suck, but it was enough time that it all sunk in.
And yet, still had the day come all that shit was rendered null and void due to not being aware of my surroundings for 30 seconds...
Not exactly confidence inspiring