Twitter has been derided for overwhelming followers with the boring minutiae of other users' daily lives and contributing towards narcissism. But it can also save lives. Hollywood actors Demi Moore and Nia Vardalos were linked to a series of Twitter posts that led Florida police to intervene in a threatened suicide attempt, reported KTLA news.

Moore's Twitter account responded to a tweet from a young man who had threatened to hang himself in Casselberry, a town north of Orlando, Florida. Her account, mrskutcher, includes more than 2.5 million followers. She and actor husband Ashton Kutcher are both heavily involved in the online social network/microblogging service.