Florida's "stand your ground" law is not as loose as it is presented. It covers only people that kill based on a reasonable belief that they are in danger. To kill based on an unreasonable belief is still a crime.

Notwithstanding that, I still think it is better not to have such a law. If you face a real threat, and you can protect yourself by moving away or by shooting someone, I think it is valid for the law to say that you ought to move away rather than shoot.