Libertarianism is a lot like objective moral/natural law, it is both prudent, benevolent and rational, and human beings generally don't want to be prudent, benevolent or rational. However, infractions against morality are not reflective of a flaw in morality, but in a general moral depravity in the human race.
We don't consider laws against murder a failure every time they are broken, nor do we even entertain the notion of giving up on those laws. By the same token, libertarians should expect massive resistance to something as otherwise moral and rational as the principle of non-aggression and respond with a healthy balance of patience and, where appropriate, moral outrage.
Granted, I consider myself to lean libertarian more so than being all out, and I think that there are standards of civilized behavior and social decorum that cut against some of the more ridiculous examples of free speech/expression (I have no problem throwing the book at Pussy Riot for defacing a historic church), but I'd take the most extreme form of minarchism over the ridiculous mess pretending to be a government at present in the good ole U.S. of A.
“My attitude toward progress has passed from antagonism to boredom. I have long ceased to argue with people who prefer Thursday to Wednesday because it is Thursday.” - G.K. Chesterton
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