When the government is monitoring you because of a internet post with one idea in mind, however the post was misinterpreted as something absolutely different, usually regarding crime, violence, politics or terrorism.
Blogger: "The party last Thursday was the bomb! That white house with the killer sub woofer really started a revolution. Even the President should be impressed!"
CIA agent: "Thursday, Bomb, White House, Killer, Revolution, President"
Blogger: "I'm on a list now, aren't I?"
When you have sex with someone that you have had sex with in the past -- But it only counts if you have slept with someone after you go back on the list because then it wouldn't really be going back on the the list now would it.
Sleeping with an ex-girl friend after you have slept with someone else.