The NSA has been revealed to mark and consider potential "extremists" all users of the internet anonymizer service Tor. Among those are hundreds of thousands of privacy concerned people like journalists, lawyers and rights activists.
Searching for encryption software like the Linux-based operating system Tails also places you on the NSA grid, as Lena Kampf, Jacob Appelbaum and John Goetz revealed on the German site Tagesschau. The report is based on analysis of the source code of the software used by NSA’s electronic surveillance program XKeyscore.
If they're worried about Tor, then I can only assume that a structurally anonymous, token-based VPN service must also have made it onto their "Most Wanted" list. If I was a member of the CS team, I'd be proud.