Not being political here- IN Florida you do NOT need to be assaulted by a person with a weapon to use your own legally registered weapon to defend yourself against great bodily harm that you perceive as possible a threat to your life.You mean Trayvon would have been locked up for nearly killing Zimmerman if Zimmerman didn't have a weapon to defend himself, right?
SO- if I have a registered handgun on my possession, I am not the known direct physical cause of a fight with you that begins for any reason, you are kicking my ass to the point that I reasonably perceive a possible danger to my life ( which can have a wide range of interpretation); I can use my weapon at that point to stop the threat with out being charged with a crime.
A weapon does not have to be in the hands of the person who gets shot- choking, banging someone's head against a hard surface, slamming someone to the ground, striking repeatedly with fists or feet ALL can constitute physical threats to one's life.
So whether the guy with the gun obtains immunity from prosecution under stand your ground or somehow gets charged ( not likely in Florida based on recent history) - the guy with no gun is dead - not worth the price of a pool cue- that is all I am saying- risk/reward basics.