While I agree in principal with what they are doing(taking an active role in the prevention of crime), it appears they are trolling for trouble, which is a bad idea, IMO. If they shoot and kill someone, after making that video, there is a significant chance that they are on the hook for 1st degree murder, even if the dead guy is a career criminal. At the very least, they're gonna be facing a legal battle. Sad, because somehow our society has placed the rights of the criminals ahead of the rights of their victims.

Rule #1: The best fight is the one that never happens

Rule #2: If you find yourself in a fair fight, your tactics suck