The potential for crime is real. According to the Internet Crime Complaint Center, victims of Internet-related crimes lost $559 million in 2009. That was up 110 percent from the previous year. If you're not careful using Facebook, you are looking at the potential for identity theft, or possibly even something like assault if you share information with a dangerous person you think is actually a "friend." One British police agency recently reported the number of crimes they've responded to in the last year involving Facebook climbed 346 percent. These are real threats.