For the people who claim they'll never take action on trivial stupid tweets:
http://www.bbc.co.uk/news/technology-16810312
> The 26-year-old bar manager wrote a message to a friend on the micro-blogging service, saying: "Free this week, for quick gossip/prep before I go and destroy America."
> Mr Bryan told the newspaper that he was questioned for five hours about his Twitter messages.
"All" that happened to him was that he wasn't allowed in.