At our local supermarket there is quite a large number of P&C spaces - unfortunately there's a large number of two parent families who pull up, leave the kids in the car with one parent while the other goes in and does the shop.
Meanwhile others who need the spaces to try to wrangle toddlers or manoeuvre infant car seats out on their own can't get parked.
It's infuriating and selfish.
( and yes, I know there's no legal requirement to offer them)