[r29vzg2]

Interestingly in Dubai International Airport, they have these smart gates that recognize you and re-issue your re-entry eVisa using facial recognition. You walk up, they scan your face and show your name.

No passport gets scanned.

[cosmodisk]

This is a convenience that will turn into an absolute nightmare for average citizens in a few years time. Imagine saying something the state doesn't like and suddenly half the doors in the country won't open for you.

[markus92]

Major US airports have this too for boarding international flights.

[isykt]

For what it’s worth I’ve had no trouble opting out. A polite but firm request to the gate agent did the trick:

“I prefer not to have my face scanned. Will you scan my boarding pass?”

I have also opted out of body scans for TSA (before I pony’d up for Pre-Check) and out of their facial recognition check at Boston Logan.