Yup, because this time it is facial recognition technology. What if it is mind-reading technology in 20 years time? If you don't draw the line in cement instead of sand at some point such as now with facial recognition technology, it will be redrawn over and over and over again.
Given that several the hacker community here familiar with dystopian future literature accepts this as inevitable in many comments, suggests that a slippery slope argument is not in the least bit far fetched.
If here there are people are accepting, then in other areas of society there are people actively arguing in favor of using facial recognition technology everywhere. Those same people will probably be arguing for equivalent of telescreens once something akin to them are invented.
There exist algorithms for estimating emotion from facial video. The accuracy is kind of hit or miss, but it's enough for "he's experiencing anxiety during the security search, he must be a terrorist."
Once you can download an isotope separator or a plague kit, privacy concerns become moot. The societies not running under total AI supervision will simply go extinct. So the question is what kind of supervised society do you want?
