If all that can be proven is that he was running Silk Road then the major concern is that he was really nothing more then a forum operator. Although he was marketing his forum to people trading illegal drugs he should not be held responsible for what was sold on it
He made huge amounts of money from the drug selling business going on on his "forum" on his watch.
He was in it for the $$$ - get rich quick.
He just made the site, so fb owner should get sued for creating network where people set up drug deals easily also?