Yeah, that's Absolutist Libertarianism and not what I consider libertarianism. A concept I do believe would sell with the Sheeple is Federal Libertarianism, in which even the speed limit concept you eschew in yer example would suffice against an argument for Federally-mandated speed limits. If the States or Localities want to mandate said limits, they can argue it out amongst themselves, but the Feds have no say in the matter whatsoever!! For instance, I was in Montana for a wedding a coupla years ago and the speed limit outside of City Limits was something like "Safe and Reasonable" or "Reasonable and Prudent," meaning in essence that if you wrecked or were seen outta control, you got a ticket for speeding, otherwise you could drive as fast as you wanted and nobody messed with you.
Of course, Federal Libertarianism is also known as Constitutionalism, which our Founding Fathers wisely put into place, but our SCOTUS has gradually allowed to be eroded.
FReegards...MUD
FreeMerryXmasRegards,
Karen