I doubt that they use face recognition for tracking, instead they can just log MAC addresses of mobile phones that come within range. Here's an example of a co

I doubt that they use face recognition for tracking, instead they can just log MAC addresses of mobile phones that come within range. Here's an example of a company selling this: https://www.skyhook.com/blog/nuts-and-bolts-of-location-intelligence https://www.skyhook.com/blog/nuts-and-bolts-of-location-inte...