Facebook has a reputation of running roughshod over its users’ privacy and then acting as if there is a ‘no harm, no foul’ attitude that we should all adopt. Whether you let them off the hook or not is your call. Most simply put up with it and move on regardless.
The level of mistrust that has developed over the years is a healthy one but let’s be realistic here. It’s mostly shared by a vocal minority that Facebook is smart enough to realize is confined in a relatively tight echo chamber. After all there are about 1 billion users of Facebook and it is probably safe to say (in an extremely non-scientific manner) that at least 95% of them either don’t have a clue about what Facebook knows about them nor do they care. When it comes to how privacy is viewed by Facebook users, Facebook knows that its best result falls under the ‘ignorance is bliss’ category. They’re not stupid. Oh, and let’s not forget, this is for Android users only which is, for the most part, a different crowd than folks using iOS for their mobile experience.