Can Blockbuster be Sued Over Facebook/Beacon?

An anonymous reader writes "A professor at the New York Law School is arguing that Blockbuster violated the Video Privacy Protection Act of 1988 when movie choices that Facebook members made on its Web site were made available to other members of the social network via Beacon. The law basically prohibits video rental outfits from disclosing rental choice of their customers to anyone else without specific written consent. Facebook's legal liability in all of this is unclear; with Blockbuster it's a straightforward case of not complying with the VPPA, the law professor says."