They See You When You’re Shopping, They Know When You’re in Line to Pay

There’s something creepy about knowing that you can walk into a store and that this store can track everything you do including where you spend most of your time, and how long you wait in line just by latching onto a frequency on your cell phone. But would you be okay with that if the tradeoff is that the store uses that information to figure out what kind of deals you’d be into? Smithonsonian magazine examines this question.