http://news.bbc.co.uk/1/hi/england/merseyside/10319053.stm
A bit crazy when you think about it - possibly every word you publicly write on the internet is scanned? Tempted to test it, but not that much.
Armed police mounted a major operation to protect pupils at a Merseyside school after they were alerted by the FBI, it has emerged.
Officers were called to St Aelred's Catholic Technology College in Newton-le-Willows on Friday after reports someone had made threats to kill there.
The alarm was raised by the FBI, who picked up a threat posted on the social networking site Facebook.
The school said it was the FBI - The United States' Federal Bureau of Investigation - who raised the alarm after internet scanning software picked up a suspicious combination of words.
A bit crazy when you think about it - possibly every word you publicly write on the internet is scanned? Tempted to test it, but not that much.