Two independent privacy advocates have asked Facebook (FB) to withdraw proposed changes to its privacy policies that would allow Facebook to share user data with Instagram and employ more lenient restrictions on messages sent within the network. According to the Electronic Privacy Information Center and the Center for Digital Democracy, the changes “raise privacy risks for users and violate the company’s previous commitments to its roughly 1 billion members,” Reuters’ Alexei Oreskovic reports. The groups warned that Facebook’s proposed changes, which the company announced last week, will likely result in an increased amount of spam on top of any privacy issues. “Facebook’s proposed changes implicate the user privacy and terms of a recent settlement with the Federal Trade Commission,” the groups said in a joint letter to Facebook co-founder and CEO Mark Zuckerberg.