The cavalier attitude says to me that this company is still a start up at heart. Early-stage companies often break a lot of rules that’s how you get big. Facebook is just still doing it.
There's really nothing compelling Zuck and Facebook to act morally and legally.
A company's values reflects the values of its people, especially the founding people. Facebook's immoral behavior can be traced all the way back to its start and ultimately its maker.
Privacy is not a principle Facebook is willing to act on.