https://www.theguardian.com/technology/2024/sep/26/will-the-goodbye-meta-ai-message-protect-users-posts-from-being-used-to-train-ai

Though the message has been shared by many users, including celebrities, it offers no copyright or privacy protection

The “Goodbye Meta AI” message, which purports to protect the user from having the likes of Facebook, Instagram and WhatsApp use their accounts as an AI training camp, has become an increasingly common feature on timelines. It has been shared by actors and sports stars – including James McAvoy, Ashley Tisdale and Tom Brady – as well as hundreds of thousands of others.