i think you're confusing libertarian with anarchist.
libertarians think that gov't shouldn't do a lot of the stuff that it now does, like managing interest rates, keeping people from smoking pot, housing the homless and buying shi++y andy warhol litographs for hundreds of thousand$$$.
libertarians do believe in protecting citizens from violent criminals.
anarchists would have criminals injured by angry mobs or imprisoned by a private sector detainment organization.
from the point of view of moose's pal, i'd think the anarchist would be a better punishment for the sodden motorist, but a libertarian the most likley to insure that this type of thing doesn't happen again.
a democrat would have to split time in trying to get drunx off the street and choosing the best poet for poet laureate, a republican would be plenty busy invading iraq