And is there really such thing as Facebook addiction? An American psychologist believes so. In fact, he’s even introduced a new term to describe such an addiction. FAD, or Facebook Addiction Disorder, is a condition that is defined by hours spent on Facebook, so much time in fact that the healthy balance of the individual’s life is affected. It has been said that approximately 350 million people are suffering from the disorder that is detected through a simple set of six-criteria. People who are victims of the condition must have at least 2-3 of the following criteria during a 6-8 month time period.