You can see this at US airports already. Facial recognition is (sometimes? on international flights?) used, but you can opt out. If you do opt out, nothing bad

You can see this at US airports already. Facial recognition is (sometimes? on international flights?) used, but you can opt out. If you do opt out, nothing bad happens. It's not even more inconvenient, the gate agent checks your picture ID instead of the facial recognition box. Still, almost nobody does.