Anybody with a basic understanding of security is aware of this kind of attack.<p>The basic failure is that plenty of people think that by using Tor they are anonymous.<p>I'd rather have them think that and then have the real perps run in to law enforcement than to have the people that have real secrets to share and are stupid run in to law enforcement.<p>Any darknet that functions without flaws is enabling criminals as much or more than it enables legal uses, any darknet that is flawed by extension will help to catch a lot of criminals.<p>When you are doing stuff that can not stand the light of day it is probably best not to use technology that you do not fully understand.