> "You can ask us to confirm whether we have your phone number or email address," the firm states. "If we do, you can request that we delete it from our address book database. To prevent it from being uploaded to this database again through someone's address book, we need to keep a copy in our block list."

I wouldn't doubt if they remove your information from their "address book database" and add it to one or more others where they keep it forever. There's zero oversight, and zero accountability. It makes no sense at all to just assume that facebook will do anything they aren't forced to when not doing that thing could make them money. Facebook doesn't care about you, your privacy, or even the law. Facebook cares only about facebook.