Same over here, with local chains increasingly forced to shut their doors (primarily as a result of the COVID pandemic, and the various developments ever since). And I completely agree, for most people it's physically an unnoticeable change, but the change from: local, short-term, manual systems, to digitally transferable, long term, and automated ones, makes all the difference.
I'm quite confident most large chains were somewhat forced to have modern, GDPR-compliant systems in place (like Genetec for instance): undoubtedly allowing for integration of such analytics tools. And apart from that, they've had trackers in their carts (hidden in the locking-chain, or wheel-break assemblies) for as long as I can remember, and likely track user-location through app-use, or dedicated scanners too (for scanning products before you place them inside your cart); so I'm quite positive they utilize surveillance systems for that too.
Oh, did you want to opt out? Sure! You can. All you got to do is stop eating food!
I would just love to see those, that claim to be human, which are knowingly in support of these systems, try to justify the ethical ramifications in that statement alone. Which is "just" restricted to grocery shopping for now, but if the current trend continues, you'll effectively become a prisoner to your own home. And quite rapidly so, if Europol's ambitions to protect citizens from hypothetical adversary (kamikaze) drones, by use of drone swarms, atmospheric satellites and microphone meshes, becomes reality.
It's an insane timeline we're living in, and it's so easy to give up all faith; but perhaps that is exactly what they want us to do. For us to feel powerless, and believing we are incapable of making a relevant change. I share the same ambitions as you, and I believe most human beings do naturally; but it's becoming increasingly difficult when you have principles to stick by. I've already experienced this by transitioning away from big-tech platforms, and I would absolutely hate this translating into the physical world.
Interesting, in what country is this? And is it in specific areas (like retail for example), or implemented more broadly?