1) Be careful how your promote your criminal enterprise (early bitcoin talk pages about silk road are from Ross)
2) Don't commit a crime to cover up a lesser crime (Covering up running silk road by trying to commit murder by hire)
3) regularaly check the IP of your service that is running a TOR site. Requests sent to that IP should have been blocked.
The whole of morality is not contained by the law. How about those folks who broke apartheid law by going to the University of Alabama? I stipulate that operational security is not exactly part of breaking apartheid laws, but still...
Copyright laws are going way way overboard. How about breaking those laws in order to expose corruption? That could happen, easily. "Don't commit serious crimes" is advice for the conformist.