[RootbeaR]

"Facebook, MySpace, LinkedIn, Digg, and LiveJournal (among others) are all guilty of "leaking" personally identifiable information (PII) to partners, according to a recent study by Worcester Polytechnic Institute researcher Craig E. Wills and AT&T Labs' Balachander Krishnamurthy. A "leakage," by the study's definition, is the opportunity for a third party to link the information they get from the social networks (either in the form of logs or browser cookies) to someone's PII—your name, phone number, and dog's favorite treat aren't passed on directly, but can easily be pieced together."
http://arstechnica.com/security/news...m_campaign=rss