There are no laws in the United States that gives consumers the right to know what data companies like facebook have compiled. You can challenge information in credit reports but you can't even see what data Facebook has gathered about you let alone try to change it. It's different in Europe:you can request Facebook to turn over a report of all the information is has about you. More than ever,your every move ever click on social networks is being used by outside entities to assess your interest and behavior and then pitch you an ad based on this knowledge. Law enforcement agencies use social networks to gather evidence on tax evaders and other criminals employers use social networks to make decisions about prospective candidates for jobs and data aggregators are gathering as much information about you as they can sell to the highest bidder