Well be specific. Some have been caught due to using outdated Tor software. Others, like the recent Silk Road bust, because they used "hidden services" incorrec

Well be specific. Some have been caught due to using outdated Tor software. Others, like the recent Silk Road bust, because they used "hidden services" incorrectly, and the hidden services were never actually advertised by Tor as being perfectly safe. But the latter one has nothing to do with users, but with "website" operators inside the Tor network.