When I was growing up in the 70's, my local newspaper had a one panel comic in the opinion section called, "There Oughta Be A Law," or TOBAL for short.
I was picking up *two* items at the local store tonight, and I was standing in the "10 items or less" line. One of the shoppers ahead of me had about 30 items in their basket. When I got up to the cashier, she asked me, "Does that sign say 10 or 20 items?" So while watching this other customer who either didn't care and/or was illiterate, I came up with my own TOBAL: If you have more than the proscribed number of items, you will be charged a progressive $1 fee per item. So, if the limit is 10 items and you have 15, you are charged an additional $15 ($1+2+3+4+5=15). Instead of the company getting that money however, that "inconvenience fee" is applied like a gift card to the customers behind you who have 10 items or less. Just a thought....