Just found something I thought was interesting.
Cory Doctorow wrote a book which included a lot of use of a fictional distro called Paranoid Linux. Some people may have heard of it.
I just happened to come across this while doing a quick bit of web trawling - Tinfoil Hat Linux
Anyone under attack from the government at the moment? Might be useful for you.
Another good one is Incognito, which looks slightly more useable and is pretty much what "paranoid linux" is. Comes with TOR software and pgp all bundled into a KDE (I think) desktop.