Costco has a 10% return policy. Here's how it works.
Costco posts guards at the entrance who count the morons and non-morons as they walk in the door.
Hey Tynan, did you say hello to the door guard?
The door guards say to all the morons, "Hello moron, you're prolly here to buy fresh fruit, but I know you won't be able to resist a swimming pool, but no worries, we've got you covered by our 10% return policy."
Also, to the non-morons the guards say, "Hello Mr Responsible. Boy am I glad to see you. Did you see that moron who just walked in? He's a doofous. Do me a favor won't ya? Follow him to the swimming pool section and buy one too. Yes, I know you don't really NEED a swimming pool, but I'm betting you won't return it like that moron. I just need eight more people like you who are responsible. That moron really appreciates how you are so willing to give Costco money so he can love life and explore its possibilities by ignoring common sense and discovering what is really possible. Believe me, he really appreciates your support. He will be very thankful when he returns his swimming pool in a heap of a moldy mess."