Do you want your receipt?

Yes, receipts do seem to breed like rabbits in my poor overstuffed-with-credit-cards-and-gift-cards-and-loyalty-cards-and-hastily-scribbled-notes wallet.

But that’s my personal problem to sort through at home in my quieter moments.

That’s why I’m deeply disturbed by the recent phenomenon of retail clerks putting me on the spot with some variation of “Do you want your receipt?” or “W...