>>106285174 (OP)
well they have bluetooth sensors that track your phone's passive bluetooth emissions as you walk around the store via triangulation. they've had that for probably a decade. your bluetooth transmits various identifiers that the store reads and can attribute to you. they wouldn't need cameras to change the price.
before you think about turning off bluetooth, there's "negative sensing" too thanks to a suite of sensing that detects the combination of a) your physical shape b) your face c) [optional] your walking gait d) [optional] your pathing and loitering trend e) no bluetooth emissions.
and before you try to fool the collaborative sensing with a fatsuit and a tack in your shoe and a face-altering disguise and pathing and only pay with cash... you are "unidentified" with a hash, and that is an identifier, and any mistake will correlate your "unidentified" persona with your real one.
so your best bet is impersonation and false identity, where the collaborative sensing mis-identifies you as someone else it already knows. even then, there's anomaly detection that can raise red flags. but you can bet your ass that no one is monitoring those alerts... because there are other false positives all day most likely, and you'd be the only true positive most likely. it's the same way you defeat tracking dogs: you can't defeat the dog, so you have to defeat the handler by making them distrust the dog, or decline the pursuit. false positives already do the heavy lifting especially in low-threat environments.
just buy from your local farmers market, or direct from farmer(s). ditch the grocery store.
