In California you can physically defend yourself from someone who is uttering "Terroristic Threats" at you, so in CA there is a way to handle someone who is not in the process of harming you.
But one guy recently had to fight hard against assult charges after he chased down the street after a burglar he caught in the act, and beat him a few times with a baseball bat. I'm convinced that public opinon kept him out of the cage.
I'm not sure what would happen to this woman if she had shot the guys privates off. I wonder if she got charged with concealed carry or brandishing a weapon.
Remember the "Death Wish" guy in the subway stations?