First, the phrase "radical libertarianism." Do these two know that "radical" derives from "radix," the Latin word for root. To think radically is to think down to the root of the matter. The equation of libertarianism with communism is ham-handed to say the least. I'll bet these guys have nothing good to say about the "communist witch hunts" of the '50s, though they have no problem starting a libertarian witch hunt for these days. They should read Kropotkin's Mutual Aid. Or Nock's Our Enemy, the State.