In 2007 the New York State Attorney General made a deal with Facebook. To provide Facebook with the online identifiers of registrants. New York also passed the E-STOP Law in 2008, the first of its kind. This law requires registrants to provide their online identifiers and email addresses and the New York Division of Criminal Justice Services passes the information to not only Facebook, but other social network sites that have users who are minors. Here is a link from the press release that also contains a list of other sites that registrants information is passed onto. https://ag.ny.gov/press-release/new-york-state-attorney-generals-e-stop-law-removes-additional-sexual-predators-social