What are the consequences, though? Yes, they have a lot of data about me. What can they do with it that damages me? And even if we can imagine something that benefits them at my expense, every news outlet DREAMS of publishing a "Facebook ruins user's life with privacy invasion" story. Doesn't take many of those for wholesale evacuation of Facebook, does it?
The consequences range from enabling the surveillance state, data theft, NSA slurping, job loss, employer intrusion, bullying, lowering of credit scores, depression, stalking, jail.