An Austrian waging a battle against Facebooks privacy policies said Wednesday that 25,000 users of the social networking giant have signed on to his class action lawsuit. The suit, filed by lawyer Max Schrems, claims a symbolic 500 euros ($660) per plaintiff from Facebook for several out of a long list of alleged violations of the law, his advocacy group Europe-v-Facebook said. These include its privacy policy, Facebooks alleged participation in the US National Security Agencys PRISM snooping programme, and tracking users visits to other websites with for example the Like function. Media-savvy Schrems, who first took on Facebook several years ago as a student, filed the legal action in Vienna last week.