[evilDagmar]

Google already does what people are spewing apologetics about as justification for Facebook's behaviour, but they do it the right way.

Google's SafetyNet scans the system files, but it looks for _specific_ files that should not be there and ensures that certain files that must remain unaltered actually remained unaltered to ensure that the security model is still intact, so it doesn't need to violate copyright laws by stealing copies of files off the user's phone without permission or user awareness.

...and funny that you mention Windows Defender because it repeatedly advises the user that it might upload files to Microsoft and asks for their approval for doing so at multiple points. Microsoft is being perfectly transparent about what they're doing and giving users the ability to opt-out. They're also the people who make the entire operating system so they've got an obligation to try real hard to prevent another Blaster incident. Facebook just makes a social media app.