Information Law, Policy and Digital Privacy
See Catherine Crump (ACLU and PRG member) quoted in this article about employers and prospective employers asking for access to Facebook accounts: http://www.cnn.com/2012/03/22/tech/social-media/facebook-password-employers/index.html
Article via Ars Technica in which researchers discovered that Facebook may inadvertently be outing gay users to its advertisers. http://arstechnica.com/tech-policy/news/2010/10/more-privacy-headaches-for-facebook-gay-users-outed-to-advertisers.ars