This could actually be very invasive and in a gray area privacy-wise. I guess this is a matter of not having expectation of privacy in a public place where the

This could actually be very invasive and in a gray area privacy-wise. I guess this is a matter of not having expectation of privacy in a public place where the camera/sensors are being set up? I live in Mexico and had no idea this kind of techniques were being used, let alone by politicians. Recently there has been a lot of enforcement here on privacy policies being displayed physically in places where the business may be collecting your personal data, yet I've never seen an ad saying "I'm recording your reaction and using this for research".