It seems there is not only overactive IMAGINATIONS going on around here, but there appears to be a shocking amount of ignorance being displayed about what SYG is and is NOT. Let's clear this up once and for all.
The easiest way for those of you mentally challenged about this topic is to consider SYG simply nothing more than the "castle doctrine" applied to you in public. The castle doctrine simply is the right to defend yourself and your family from those who you reasonably think will cause death or bodily harm. Its says that when using deadly force, I do not have the obligation to retreat first and then use deadly force in self defense.
SYG is the simply castle doctrine in public places where you are legally allowed to be. It essentially says that if I am somewhere where I am legally allowed to be, like a public sidewalk, a drive-thru ATM, a grocery story, a gas-station, etc. AND I am faced with a threat that I believe will reasonably cause me bodily injury or death, I can use deadly force in SELF-DEFENSE without the prior obligation of having to retreat first.
In BOTH cases - I must meet the basic SELF-DEFENSE requirement. SYG is nothing more than self-defense without the need to run away first. The thought process behind it is that obligation to run away might (and has) exposed you to more potential danger than just initiating the self-defense when first confronted with the threat.
Castle doctrine DOES NOT:
-Allow me to shoot my neighbor inside my house if we get into an argument his over loud music
-Allow me to shoot my wife's lover when I catch them shagging in my bed
-Allow me to shoot a retreating burgler who has already made it outside the house and is running away
-Allow me to shoot or shoot at my spouse in the middle of an argument
SYG DOES NOT:
-Allow me to walk up to my neighbor's driveway and shoot him when we get into a shouting match over the loud music
-Allow me to shoot a mentally ill guy through my car window just because he is screaming at me from outside
-Allow me to stalk a stranger in the neighborhood and execute him for holding skittles
-Allow me to shoot a guy sitting in his car because the music is too loud
In BOTH cases - the basic self-defense precepts MUST apply. i.e. you must be reasonably in fear for your life or in fear of serious injury to you or someone else. If that basic self defense threshold is NOT met first, neither castle doctrine or SYG laws should or will save your stupid ass.
Just because some idiots misuse or msunderstand the SYG law and apply it incorrectly doesn't mean the law is flawed. To get a CCW, you are supposed to be clearly trained in when Self-Defense and SYG does and does not apply. The reason GZ vs TM wasn't SYG is because GZ was pinned to the ground fighting for his life - there was nowhere to run, therefore SYG didn't apply. If GZ had pulled out the gun and killed TM while they were simply arguing or having a shoving-match, then SYG wouldn't apply either because there was no need for Self-defense and GZ would have been a murderer.
JFC, this shit is not rocket surgery!