Don't be surprised if you receive some ad-hominem abuse from libertarian evangelists when you don't accept their arguments. It's no different than if a communist called you bourgeois or a Bircher called you a commie lover. Sometimes they'll go overboard and even accuse you of mental disease, at which time you can point out to them the fine company they keep: Stalin, Hitler, etc.

(from Critiques of Libertarianism)