I was doing some research on facial recognition for a job where we were considering its use. I came across examples of sentiment analysis being used at Walmart

I was doing some research on facial recognition for a job where we were considering its use. I came across examples of sentiment analysis being used at Walmart and Target. They have big and conspicuous cameras in every one of their stores now. Most people assume it is for shoplifting mitigation, which it is. But that is not all. They can use it to track individual customer's paths through the store and then use cameras at the checkout to analyze your facial expression and rank your mood. They use this data to optimize their store layouts. The other use case was at high-end retail stores. Places like Luis Vuitton, Hermes, etc. They have facial recognition to log high spenders. If you drop 10k at Coach and then go down the street to Valentino their security system will recognize you and highlight you as a VIP customer. A specialized customer assistant then comes out to give you personal attention, maybe to invite you to the private shopping experience. I learned about these in 2017 I believe. Most non-technical people who I've told about this think it is some conspiracy theory and they often don't believe it. For some reason people are scared of the government but they remain totally docile or willfully ignorant in the face of corporate use.