In a California CCW class I attend a case study is used. Essentially a guy carrying a handgun with one in the pipe goes into a bar. Some other guy takes issue with this guy and assaults him. The guy with the gun, in defending himself, draws it and wacks the assauter across the head. The gun dischages and kills a little old lady walking down the opposite side of the street from the bar. The guy with the gun was charged with murder.
When the number of people in institutions reaches 51%, we change sides.