AT&T Labs, Worcester Polytechnic Institute study shows social networking sites leaking personal data. Data aggregators are able to attach a unique identity to each profile, researchers say. The information allows them to scoop up personal data from a user’s social network page and to track that user’s movement’s across multiple Web sites across the Internet. EFF: Leakage may be unintentional, but in others, there is clever and surreptitious anti-privacy engineering at work. Users of social networks need to disable flash cookies and ensure that all other cookies are deleted when the browser is closed.”]