The first thing that will happen is Facebook putting up a "light" version in the AppStore with half of functionality removed and pestering people to sideload the "full" version, that will, naturally, come with tracking, snooping and all other unethical bs that they love so much.

As I mentioned in another comment: yep, that's just like they did on android, except no, they didn't, everything is on the app store. I'm not sure where people are getting these fantasies from.

So you, as a person concerned with privacy, will not install non appstore version, easy peasy sr even better- not install fb at all. You keep your security, and ppl that want sideload will have what they want, everyone happy. And it's quite ironic that on Android the app works as usual, no crippled version