Being paranoid is a fundamental necessity to winning this war against the current oppressive regime that we are locked in battle with. Without paranoia, and the consistant carefulness that comes with it, our cryptography and other technological tools of anonymitity are flat out worthless. Nobody should trust me with their lives, freedom, or anything of similar value. But then again, you shouldn't trust ANYONE on the deep net with those things either. Just because somebody can verify that they also own another username with a PGP key doesn't mean you should ever let your gaurd down. It's like Libertas said from the get-go, "treat every marketplace as if it is compromised". If you do not possess a healthy amount of paranoia, then participation in places like Silk Road is not a safe idea.