Earlier quoted context omitted.
There are very, very few moral applications of facial recognition. Logging into your phone/laptop or assisting people with prosopagnosia, I guess. Everything else basically enables mass surveillance. It is frankly astonishing, and an exemplar of technologist naivete, that so much effort was (and continues to be) dumped into developing this technology.
Flagging “America’s most wanted” in public places like train stations or airports. Looking for missing children. Having home automation react differently to different family members. Those are all usages I am personally totally ok with.
And what happens if we descend into military rule or a dictatorship? With "America's most wanted" fliers, the general public can just refuse to participate. With facial recognition, anyone deemed an "enemy of the state" can easily be tracked and eliminated.
Always assume the worst and work your way back to the good when doing the cost-benefit analysis.