This is an important point for the uninitiated: Tor is anonymous, but not secure. Only send data if (1) you do not care if it is intercepted, as long as (2) it can't be traced back to you.
http://www.wired.com/threatlevel/2010/06/wikileaks-documents... says "The siphoned documents, supposedly stolen by Chinese hackers or spies who were using the Tor network to transmit the data,..."
What kind of sick spy uses TOR to send important documents in palin text?