Originally Posted by
straygaijin
Frischling stated that he received the document anonymously from someone using a Gmail account
In which case, I would have no trouble sending a twitt to 'the source' - if our only communication had been through a gmail account I would be pretty confident that the source would not reply via twitter.
If the source responded via email the TSA goons can decipher the headers to find the ip the source is using. Then it is a simple matter of contacting the ISP for the source's name and address.