

Whether you like it or not, they probably already know who you are too. They’re collecting shadow profiles of people who haven’t signed up through various means.
If others have posted pictures of you on a meta service, there is a good chance it already knows what you look like and they know it’s you even if you’re not tagged.
People who allow them access are just less work for them. And now they have info to train their so-called AI models. Now it’s a question about what are they going to with them. The application is wide. Create fake pictures, create fake profiles, etc. And at some point we will find out about a massive data leak that happened because the company is run by unapologetic sociopaths.
But you had Facebook. That’s as good as having it. They know you. Their grubby tentacles will never let go!