Ceux qui veulent nuire et ne pas être reconnu peuvent contourner le système de surveillance avec un bon masque en latex, non?
https://duckduckgo.com/?q=facial+mask+latex&ia=images&iax=1

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A comedy club in Barcelona is charging patrons per laugh. This is real, according to the BBC. The Teatreneu club, in partnership with ad agency The Cyranos McCann, has installed tablets on the back of each seat equipped with facial recognition software that can apparently detect when you laugh. The going rate is 0.30 Euros ($0.38) per laugh, up to a maximum of 24 Euros ($30.45). In other words, buy 80 laughs and the rest are free.
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un théatre barcelonais fait payer le rire à l'unité. wtf.