You two are wrong, he has a point and the point is solid - until somebody really puts effort and skills into taking down Darkash, nobody will ever know how secure the network is.
You don't think they've already tried ?
Its an interesting point that it would take a silk road event for people to try and attack the anonymity.
However, I'd suggest that the competition have been trying.
Second, Silk road users were tracked through tor leaks or issues about incompatibility with tor and the way captcha works - well, that's the official story, from memory.