Privacy groups ask Facebook to withdraw proposed policy changes

SAN FRANCISCO (REUTERS) - Two privacy advocacy groups urged Facebook Inc to withdraw proposed changes to its terms of service that would allow the company to share user data with recently acquired photo-application Instagram, eliminate a user voting system and loosen email restrictions within the social network.

The changes, which Facebook unveiled on Wednesday, raise privacy risks for users and violate the company's previous commitments to its roughly 1 billion members, according to the Electronic Privacy Information Center and the Center for Digital Democracy.

"Facebook's proposed changes implicate the user privacy and terms of a recent settlement with the Federal Trade Commission," the groups said in a letter to Facebook Chief Executive Mark Zuckerberg that was published on their websites on Monday.

By sharing information with Instagram, the letter said, Facebook could combine user profiles, ending its practice of keeping user information on the two services separate.