Yeah, I don't have any problem with libertarianism in theory. Pro-civil liberties, anti-racism, anti-war, pro-choice, pro-guns, free markets, etc. I disagree with the value of some of it, but I can see why someone might thoughtfully and sincerely come to that sort of rationale. I've never really had a problem with Penn's (and Teller's) views because of that.

But the reality is that the majority of modern libertarians are just narcissist capitalists that do not like rules or laws that restrict them from doing anything they want. That or, way worse, they're Ayn Rand ideologues who genuinely believe that self-service is a moral imperative, charity is immoral, poverty is personal failure, human life is measured in productivity, and the sick, poor, or malformed should be left to whatever fate the market gives them. Those types are some of the worst people on the planet. They see a wealthy capitalist as inherently a leader and role model and think he should be unconstrained from accumulating more wealth without concern for society, employees, or individual rights. We're living in the light version of their ideal, and it gets closer to that ideal every day.