It's tragic that an innocent person will be inprisoned by the government and that the free market has been interfered with, but I'm confident that an even better Silk Road will appear in the near future.
Didn't DPR say that he bought Silk Road from someone else? What happened to that? Was he just lying?
Would you believe that I, as an ancap, also find Rothbard unconvincing? Not only that, but I don't think the "non-aggression principle" is an adequate guide for political philosophy. I'm not a libertarian due to moral axioms, but rather, because I think it produces the best outcomes.
I'm also a "Friedmanite ancap", though I also generally believe that the NAP is a good moral rule to follow in almost all cases. Rothbard may have contributed a lot to libertarianism and economics, but his ethical theory is contradictory in some places in disturbing in others.
Even if you're an ancap purely for moral reasons, it's good to know the non-moral arguments for it: A lot of people simply
disagree with the NAP, and your moral arguments will be useless against such people.