81% accuracy in binary classification isn't something to write home about, either...
That said, the concern of this is the potential to do this on at scale in a horrible distopia. Cameras in airports and on sidewalks automatically scan people for "undesirable" features and they end up in reeducation camps or just simply disappearing.
Just wait until somebody publishes a "terrorist facial classifier" with "99% accuracy". That's when I'll be scared.