Literally looks like a step towards algorithmic driven totalitarian hell.
Imagine....
"worker drone 2349243A, your mask slipped down your nose for 0.34s before you corrected it. This is in violation of your employment contract, and therefore your employment is now terminated.
Email auto generated, do not reply "
But imagine..
"someone's mask slipped down his nose.. starting faces recognition in 3.. 2.. 1 second"
I'm scared of using tube since some women cough straight on to my face and then just said "I have mask exemption", no apology - with no time for me to react, I could only tell her "I don't care about your exemption or which virus you don't have, just cover your mouth when you cough !" - I think is a cultural thing - here in London no one is doing any of this.