I just experienced one of these facial scanners in the UK while boarding a plane for the US. The thought had occurred to me that this could become the norm and that there’s nothing one could actually do about it and that we are already living in the dystopian future we feared, where no one can truly ever be anonymous. But I also wondered about various problem scenarios. If the scanner couldn’t match your face, would they deny you entry? If so, what would happen if someone had plastic surgery or some other condition that altered their face? What if this technology becomes so pervasive that your face is scanned everywhere you go? Where does any of this end?