It's rude to return broken items.
Melissa breaks a lamp she's had for years, then remembers that the store she bought it from has a generous lifetime return policy.
Melissa wants to go to the store she bought the lamp from.
Melissa goes to the store she bought the lamp from to purchase a similar one.
Melissa brings the broken lamp to the store and demands a refund.
Melissa is more careful with her lamp after having to spend the money to replace her old one.
The store tightens up it's return policy after being abused too many times by people like Melissa.