Seems as if only 1 person can enter the store at a time. How can store owner prevent tailgating-- that is, one person scans their payment card to unlock the door...then...several people tailgate in behind that person into the store. These person get to shop for free at the expense of the first person in line who had scanned their payment card. The person who scanned their card has no idea that they will be charged for all of the purchases the tailgators made.
Seems as if only 1 person can enter the store at a time. How can store owner prevent tailgating-- that is, one person scans their payment card to unlock the door...then...several people tailgate in behind that person into the store. These person get to shop for free at the expense of the first person in line who had scanned their payment card. The person who scanned their card has no idea that they will be charged for all of the purchases the tailgators made.