[democracy]

I worked in a theme park and we had a discount coupon so the customer could buy 2 meals with a 50% discount for the second meal.

Only in August, after 2.5 busy months one customer complained and spent maybe half a day arguing with the cashier, then with his manager, then with food supervisor, and finally with guest relations people. He got his 1(!!!) cent back. It was an error in the POS system that manages all the cash registers. However, he also saved many pennies for future guests, also hopefully the park reviewed the POS logic for other items and thus could have fixed similar errors and saved even more money for the customers.

So sometimes someone's wasted day is a benefit for many other people.