Should a geographical land area based in liberty have any ability to organize itself and administer punishment against suicidal people who threaten others?
Alot of these most egregious homicide by intoxication cases are by people who are suicidal, depressed, stupid, or all of the above.
You dont need a Police State or Statism to stop suicidal threats just a defense-based minarchy.
You are still advocating using force against someone who has not exhibited aggression against you. The only way you can make that leap is to say the person driving drunk is aggression which is utter non-sense.
How can anyone traveling be an act of aggression? I mean the only thing that comes close is trespassing, so you are claiming you own all the routes of passage?
The fact is, you really just want the state and all it's power but you just want it under your control.
So no, a land mass purporting freedom cannot impose sanctions on others. The moment you do, the person making the imposition reduces the freedom on the imposed.
Now, an insurance company could require that in order for coverage you cannot be drunk.
Now, a car company could require, while you owe money, you cannot drive the car drunk.
These are examples of freedom. These are examples of adding freedom based sanctions.
The real question here is "how do we force people to behave the way we want?" and the only answer within freedom's realm is "you don't."