replying to telos

1. people have their judgement clouded when using alcohol. They confuse distances, their reaction time is impaired, they may have halluciations, etc.
2. people are irrational to the point where they may not be conscious of their own impairment
3. If people are unconscious of the wrongs they may cause by driving, you have the right to stop the imminent disaster, because you will use violence to stop potential harm

Take this analogy
Someone puts a mentally retarded person in a room with 100 switches and 1 of those switches sends a nuclear bomb to a random country. This mentally retarded person doesn't know this and he doesn't know what the switches are for.
Do you not use force to get the person away from the room, if you know indeed that one of those switches poses a threat?

New dilemma: there is a person guarding the room and that person has be instructed to stop any intruders. You have to use force upon that person if he does not move. You have to use force if there are 2,3,4,5 security guys.

Of course this is the trolley problem. You did not put the mentally retarded person in the room with the switches. But to be moral you have to act morally despite the circunstances. So if that means breaking the NAP to prevent violence then yes, you should.

Now all this being said, you have to make the case that robbing everyone in the country to pay for the police when the police themselves do immoral actions without justification (like jailing people for non violent crimes) is itself moral. Which it isn't.
So if you are going to go through the consequentialism route instead of the moral objetivity route then be prepared to justify every possible consequence of an action, not just 5 lives are better than 1 (even this can be discussed as you could be killing Einstein instead of Hitler, Mussolini, etc).

So what is justified self defence? Like you said, you really don't need the bullet to be lodged in your brain for you to be able to act with violence in self defence. I guess fines are a good way to keep people from driving drunk, but otherwise I'm stumped.