The social networking sites were advised to change their terms and conditions last June.
Facebook, Google and Twitter have been sued in France by the consumer protection group, UFC-Que Choisir, over alleged ‘abusive and illicit’ use of users’ private data.
UFC-Que Choisir also warned French consumers to be cautious of the ‘opaque’ way in which their private information is being used by the social media sites.
"Not only are you the subject of targeted advertising but your data can be commercially exploited without your agreement," the consumer group told Bloomberg.
Despite being advised to change their terms and conditions last June by the UFC-Que Choisir, they reportedly continued to collect, modify, conserve and use its consumers’ data and their followers.
"Worse, the networks continue to allow the wide collection, modification, retention and exploitation of user data and even their connections (‘friends,’ ‘followers,’ ‘+1,’ etc..) …," the translated version of consumer group by Infosecurity noted.
"They always grant, without the consent of the individual users, worldwide, unrestricted exploitation and communication of data to business partners without recompense to the user."
Earlier, French data regulator National Committee on Information and Liberty (CNIL) has levied a €150,000 fine on Google over not meeting the requirements of French three month ultimatum to stop tracking and storing user information corresponding to the national law.