[CaptainZapp]

I'm not the expert, but from what I know

You have a right to learn what data they have about you, with whom they share it and a lot more details In addition you can opt out of anything you agreed on earlier and I would be surprised if you can't request deletion if the business has no business reason to store it. (Arguably, a difficult call with Facebook whom's entire raison d'être is to fuck with your privacy).