1) Their calls for individual liberty are really rants against democracy and the institutions established by democracy.
2) Their inability for self-reflection which stems from..
3) Their unwillingness to understand the origins of the libertarian belief system, which stems from the idea of economics as a science and of the price system as the ultimate arbiter of fairness in an economic system.
Each point will be elaborated upon in a large post I will put here within the next few weeks. For now I just want to get those of you reading this ready for the ultimate anti-libertarian screed. Bookmark me, you'll regret having not done so.