Identity theft has exploded in part because of how people use social media, says Frank Abagnale, a former con artist who later became a security consultant and now works with the FBI. "When we interview people who commit these crimes and ask them what's the No. 1 source they go to when they steal someone's identity, they say their Facebook page," he said. One tip of advice he mentions is that you should avoid posting demographic information such as birthplace and birthdate on any social media profile.