Whatever libertarianism is in theory, my anecdotal experience with those who call themselves Libertarians (I love to troll Tea Party pages on facebook and that Tea Party Community site when I'm bored) express anarcho-capitalist sentiments. The guy who first introduced me to the libertarian ideology was definitly a-c.
If we're confusing the two, it's because there's a lot of crossover.
If we're confusing the two, it's because there's a lot of crossover.