The 0.0001% was obviously a facetious figure. Meant to convey the fact that a duress feature whereby you cross your eyes while using FaceID to "alert the mothe

The 0.0001% was obviously a facetious figure. Meant to convey the fact that a duress feature whereby you cross your eyes while using FaceID to "alert the mothership" as OP said, is an extreme corner case. As another commentor said, you can't expect Apple (or any manufacturer) to build all these extreme corner cases. If you don't want to unlock your phone at the border, put it in your checked luggage or ship it to your hotel/destination. If you still think that Apple should build something like this because it's important and serves a non zero % of the population... I'd also like Apple to build... 1. FaceID that will tell me when I have something in my teeth 2. FaceID that will tell me when my hair is messy 3. an iPhone that listens to my voice and detect when I might be sick and orders cough syrup 4. an iPhone accelerometer that detects when I am limping and books a physio appointment 5. an iPhone camera that can detect when someone is watching me in the distance 6. an iPhone that will passively listen for gunfire and tell me to seek cover. See how feature requests can get out of control.