I liked Rothbard 40 years ago. He was a great education in the history of US banking and the political environment surrounding it. As I got older and dug into his philosophy a little more, I was repulsed by his ideas of voluntary servitude. It's the same issue that I have with both capitalism and Marxism in that the individual's role is reduced to an economic cog in a larger economic wheel.
Sure, people have the right to make whatever crazy contracts they wish to make. Stating that as a fact doesn't necessarily mean that we have to back up all of those crazy contracts.