Tor = broken!
There are a lot of "secret" services which are essentially broken by design. The Tor service can be decloaked if one rents sufficient temporary capacity, and then makes a lot of requests to the site in question, and the analyzes the traffic on the captive Tor nodes. Eventually, the server that you are after lights up in the statistics, and you've got them.
Tor nodes can be evil, too, dumping malware on the files being transfered. Thus when feeding traffic back to someone, you can drop into the stream some exploits to easily track the user's computer.
The only way that a service can be effectively hidden is if it exists on multiple nodes, and move around of its own accord. There was a research paper about using the logic in the Game of Life to keep nodes alive, and give a stable user experience.
And what was doxbin? A blackmailing service! Kind of like an evil Wikileaks.