Really? I guess that means I can grab a gun then go out and pick fights with random dangerous-looking people. Once they've overpowered me (I'm not much of a fighter), I can shoot them dead and say I was defending my own life. Then I can find someone else, pick a fight, get the shit kicked out of me and shoot them too. Lather, rinse, repeat, and all the goons I can shoot with no consequences. Sounds like a great system. What's missing from this hypothetical situation? Oh yeah, any responsibility on my part for instigating the fights. You can say that as long as I don't throw the first punch I'm not breaking the law, right? So I can find some drunk guy or a college jock or a roid-raged bodybuilder, tell him that after I fucked his mother her vagina looked like his face, then legally shoot the guy after he beats the shit out of me. It's consequence-free murder! Why isn't everybody doing this all the time?