The Electronic Privacy Information Center (EPIC) has filed a formal complaint to the Federal Trade Commission concerning Facebook's manipulation of users' News Feeds for psychological research. "The company purposefully messed with people's minds," states the EPIC complaint. EPIC has charged that the study violates a privacy consent order and is a deceptive trade practice.

In 2012, Facebook subjected 700,000 users to an "emotional" test with the manipulation of News Feeds. Facebook did not get users' permission to conduct this study or notify users that their data would be disclosed to researchers.

In the complaint, EPIC explained that Facebook's misuse of data is a deceptive practice subject to FTC enforcement.

Facebook is also currently under a 20 year consent decree from the FTC that requires Facebook to protect user privacy. The consent decree resulted from complaints brought by EPIC and a coalition of consumer privacy organizations in 2009 and 2010.

EPIC has asked the FTC to require that Facebook make public the News Feed algorithm.

Regulators in the U.K. and Ireland are also investigating the study.