[throwaway542134]

The fourth amendment covers search and seizure by the government, not the willful disclosure of information to a company by a user.

But I get what you mean. Even without getting into my inherent distrust of facial recognition systems and the security/privacy implications of creating the infrastructure for it to work reliably, biometrics are usernames. They shouldn't be used as passwords.

[brian-armstrong]

I wasn't clear with what I meant, sorry. I was referring to how face unlock can be compelled but passwords cannot, though I realize now this is actually 5th amendment.