Thanks for the info. I'm mostly more concerned with privacy laws than copyright, since I think those laws are much more applicable here.
For an introduction to the issues and the laws, read this law review article. Michael Froomkin, Cyberspace and Privacy: A New Legal Paradigm? The Death of Privacy?, 52 STAN. L. REV. 1461 (2000). http://www.law.miami.edu/~froomkin/articles/privacy-deathof....
This case deals with exceeding authorized access on a website: Konop v. Hawaiian Airlines, Inc., 302 F.3d 868 (9th Cir. 2002) http://www.internetlibrary.com/cases/lib_case32.cfm