Nice bit from Charlie Stross in a post titled "Why I want Bitcoin to die in a fire", (which is worth reading in its entirety.)
. . . I tend to take the stance that Libertarianism is like Leninism: a fascinating, internally consistent political theory with some good underlying points that, regrettably, makes prescriptions about how to run human society that can only work if we replace real messy human beings with frictionless spherical humanoids of uniform density (because it relies on simplifying assumptions about human behaviour which are unfortunately wrong).
