Taunting the police on Facebook has limited benefits -- as one wanted man in the U.K. discovers when it takes police just 12 hours to catch up with him. They leave him a taunting message on Facebook in return.

You are your Facebook account. Public or private, its contents define you in a professional, commercial and social nature. Your photos are keepsakes, and personal messages can be confidential exchanges. Either way, it's an identity you want to protect.