This one is for Neko.
"If the girl has a gun in her hand she becomes the weapon. If he gouge her eyes and broke her arm or legs as disarmed her thats tough sh%$. And shot the other two punks with gun he took. You order sh$%%, you eat it. Get a Job like the rest of us."
Unfortunately, in our lovely litigious society this would over-step the bounds of reasonable force. Sure, you could probably get away with killing or maiming the person with the gun, but as long as the other two were just standing there you couldn't by law touch them. As a trained person you open yourself up to more liability than your average joe. To put it in words closer to your own, they might have ordered sh!t but you'd end up stuck with the check.
However, I agree with your general sentiment. As one of my previous instructors used to ask, "Is it better to be tried by 12 or carried by 6"?