FB didn't do anything wrong
FB's big money maker is selling personal data, advertising is second place. Send an email to a "friend" that you are thinking about getting a new car and see what happens. Mention that you are thinking about going on a cruise in a private email. There is so much information about everybody that with only a few key pieces of information, a whole flood comes back. Sign up to be their bitch and they peel you like an onion.