I will believe it works when I see it actually work somewhere. What happened to the plan to take over a state and make it libertarian? Haven't heard anything since they made their decision (which was not supported by many other libertarians, BTW).
How about actually trying it here? God knows liberalism, socialism, reformism and "compassionate conservatism" coupled with "familiy values" have sure as heck had their chance at it over the last 100 years or so, and have led us straight to the present mess.
At least the social programs that breed irresponsibility by allowing the dregs of society to have more time and energy for copulation to breed the next generation of stumbling blocks would stop. Furthermore, even though I don't agree with their open border stance, I don't see as how a totally open border would be much different to what we have now.