Watch NSA Watching You
Read it for yourself, but the short of it is: You set up a pair of email addresses, one foreign, one domestic. Then send yourself emails filled with terrorist code words and a link to a private website on which you have web-stats enabled. Catch someone surfing the site, and bingo! You've just nabbed the Feds. Course, you might also get an unfriendly knock on your door.
Take that, you Justice Department hack!