This is hilarious, really! Twitter and all the other social network tools have found an alternative application - assisting burglars in their attempts to break into your home. Let me give you the very simple example:
Jenny_sexy_86 tweets on Monday 15 Feb: Yuppi, finally leaving the city and going to that isolated resort in those isolated mountains! (in the most preferable of the cases Jenny_sexy_86 would also share where exactly she has left her keys)
Guess what? There is a bunch of malintended people who just wait for your 'leaving the city' tweet and who regularly check the PleaseRobMe.com website. Think twice before tweeting!