@dckim @Tutanota I would argue they shouldn't "own" the data of those whom never agreed to their TOS.

For instance, if they scan your contacts to "find friends easier", they can't save info on users who do not match with the actual users of their platform. But I doubt we have any real insight into how much data they actually save on us, and if they do shadow profiling...

@andrearivolta_xyz I think they probably mean what you are doing when you are not on Facebook, rather than actually offline...but I wouldn't put it past Facebook to hoover up your private metadata from your phone if you use their app.
Anyway...I digress https://www.pcmag.com/how-to/how-to-stop-facebook-from-spying-on-your-internet-activity

@Tutanota

@andrearivolta_xyz @Tutanota Few potential ways on how to do this would be storing what you'd normally track when online into a file and then sending that file to Meta servers once the device is connected.

(That is a possibility, can't confirm whether they're doing this but it is most likely.)

As for offline activity as in not on device, the device has microphone, sensors, gps, etc. so those are abused not just by Meta.