Do we need a little touch of reality here? If and when you use a firearm against another human being, you ARE going to JAIL. That is the duty of the police. They do not determine guilt, innocence, or justification. Their job is to arrest someone when a crime is committed. If you think you are going home after a shoot, you should get your head out of the clouds.
Everyone has to determine for themselves when it is appropriate to shoot, and then they have to defend that choice in court.
I have my line drawn. I will not be hit. I will stay away from areas where trouble could be expected. I will walk away or run away, or hide, if possible, The kids in this scenario gives my choice no flexibility. When the man threatens with the bat I will be in condition four(red?) (danger imminent, threat identified, pistol drawn, decision made to fire, awaiting proper target). His abandoning the bat only means he has identified me as a sheeple (mistakenly), and is anticipating an easy victory.
If memory is accurate, it was Jeff Cooper that created the situational awareness levels.
one (white) blissfully unaware of surroundings
Two (yellow) alert and aware of surroundings, including people in the area
Three (orange) Aware that you are in trouble, and evaluating threat and your required response.
Four (red) Immediate response is required, threat is identified, gun is drawn, and target is acquired.
In my opinion, when he presents the bat, and a verbal threat, he has pushed me from orange into red. He has declared intent to do grave bodily harm. He has the means to do so. I can not retreat (because of the children). When I determine him to be two steps from striking distance, his life is forfeit. I will interpret his disposing of the bat as preparation to access a more lethal weapon, if he continues to advance.
I will NOT speak to police on scene. I do not even know if I will BE on scene when they arrive. If that situation came down and I was alone, and I did not think a witness could identify me, I think I would drive away. If I can avoid having to prove self defense in court, it may mean the difference in bankruptcy, and a comfortable retirement.
I think our criminal justice system is criminal, but i do not think it is justice.