Couple of things:

When your card is scanned everything that's on the front of the card: your name, address,
height, weight, and license number is accessed, including any other additional data.
Personally with security and personal data being used for any purpose deemed legit by
the company doing the scanning I don't feel I need to volunteer my information just because they say they want it.

Additionally, if returning an item requires scanning a drivers license then the store
should post that requirement and should say up front that it is a requirement rather
than saying "can I see your License?" and then taking it and doing so without asking.
As I previously stated I no longer allow anyone to handle my drivers license period.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….