They may be tracking me, but that doesn't mean I have to cooperate and help them do it. Plus the obviousness of it bothers me. That may be disingenuous, but there it is.
It's creepy. It's like Target tracks its customers, and sends targeted ads to people. One guy got all kinds of bent out of shape when they sent his house ads about diapers and whatnot. He has a teenage daughter, but no reason they should get ads about being pregnant. He went to the store to complain and then later found out his daughter was indeed pregnant, but hadn't told him yet.
I see the magic bands in a similar way.