I don't mind my grocery store tracking my purchases because they can't link it to anything else about me. Granted I always pay cash (at those self-checkout mac

I don't mind my grocery store tracking my purchases because they can't link it to anything else about me. Granted I always pay cash (at those self-checkout machines with bill acceptors -- why can't gas stations have them?) and got a plastic rewards card without giving my phone number. So it is a little bit of work, but it works.