"reports last June and December that Facebook had given business partners — including makers of smartphones, tablets and other devices — deep access to users’ personal information, letting some companies effectively override users’ privacy settings."
suggests breach-of-contract. Just by creating those privacy settings, the company is 'saying' to (promising) the customer who elects to use them that it will protect that information. That's an (implied) contract. Subsequently allowing anyone else to access that information is a breach.
It'd be interesting to see FB argue in court that breaking promises was okay as a form of restitution for the services they provide.