news i m kristen haufstead. and i m katie kauffman. for many students social networking is a way of life. facebook is at the center of a new controversy, affecting tens of millions of users, even those who have their profiles set to private. melissa hire has more. melissa. reporter: katie, almost every student here probably has a facebook. we see them logging on 9/11 class. this week the social networking site said they unwittingly gave out third party ids to users. this is farmville. here is how your information may be shared while you re playing. you may be harvesting your animated farm and the popup says you need a cow. a company sends you an advertisement for milk. hypothetical scenario, but facebook admitted they are sharing information. every site is trying to capture information on their users, where their users go, and what their users do when they come to the website. that s all very, very important information. reporter: popular games associated with the w