RFID readers that sniff your cards even if you don’t use them
Considering I don’t EVER carry a Wallet or ID, they would have to go find what I drove there in to read anything because My ID and such is Always in what I drove, NEVER in my Pocket
Security cameras. They know who you are. They’ve known who you are for a long time. Read the Target chapter in The Power of Habit. And understand they had that level of ability to track your buying habits over TEN YEARS ago. The tech advances have only made it easier for them. They know who you are, they know where you live, and they send you targeted ads.