Demi Moore responds to Twitter suicide threat - CNN.com

What many folks will miss in this "celebrity saves a commoner" story is this
tidbit of information.

"Twitter followers who saw the message tracked it to a San Jose, California,
home"

Twitter followers, or online "stalkers" tracked the message to this ladies
HOME, wake-up! If regular folk can track, imagine the resources at the
governments disposal.

http://www.cnn.com/2009/SHOWBIZ/Movies/04/03/moore.twitter.threat/index.html