In my scenario, you'd have to be able to demonstrate an obvious and immenent threat to others that would have required no further action. In other words, if you're just sitting in a parked car, drunk, that will never result in you causing an accident... until you put the car on the road and actually swerve around and hit someone. If your dash cam shows a car weaving in and out of traffic, with other drivers slamming on their brakes and honking horns to avoid causing a collision, or a vehicle driving the wrong way down the street, or perhaps a vehicle at night swerving around with no lights on of any kind... that is very likely to hold up in court.
I've always been of the opinion these extreme cases mess up my property, anyhow, since my brakes suffer from all these last-minute saves.
If we're to err on the side of caution, and simply never stop someone until they've caused loss of life or limb, then that's acceptable, but I don't see why one would have to go to that extreme end of the pole.