[bcyn]

I can't speak for other platforms, but if you've ever developed apps for iPhone, you'd know this is pretty much impossible for FB to do.

[saagarjha]

Doing this specific thing is quite easy, using public APIs, just by correlating data between signed in users.

[bcyn]

I should be more clear: I'm referring to secretly recording audio.

[ethanwillis]

Depends if you're sitting on a pile of exploits. Or just abusing loopholes to collect information from minors.

Is our memory really this short?

https://techcrunch.com/2019/01/29/facebook-project-atlas/