A website called PleaseRobMe has been launched to highlight the dangers of sharing too much information on the internet about your location.
The site pulls together updates on Twitter from people who publicly broadcast where they are at any given time, making the point that if they are in the pub, for instance, they are not at home and could be burgled.
More at:
http://technology.timesonline.co.uk/tol/news/tech_and_web/the_web/article7032820.ece
See also:
http://pleaserobme.com/
This site makes a pretty strong point - but just for robbery, but, even worse, for kidnapping and stalking. What compels people to do this sort of thing? So many claim cellphones are for safety, then they go and sabotage themselves.
Bah humbug.