This fall Lyn Ulbricht visited her son–a handsome, outdoorsy 29-year-old–in San Francisco, stayed with him in his Monterey Boulevard home and went camping with him in a redwood forest. She had no hint that just weeks later Ross Ulbricht would be arrested and accused of having been the Dread Pirate Roberts, the alleged mastermind behind the web’s most popular anonymous black market for drugs known as the Silk Road.