Privacy watchdog Noyb sent a cease-and-desist letter to Meta Wednesday, threatening to pursue a potentially billion-dollar class action to block Meta’s AI training, which starts soon in the European Union. In the letter, Noyb noted that Meta only recently notified EU users on its platforms that they had until May 27 to opt their public posts out of Meta’s AI training data sets. According to Noyb, Meta is also requiring users who already opted out of AI tra