Re:Not as smart as they think... (Score 1)

My father used to use a similar trick with Burger King. He had found a valid buy-one-get-one free for a Whopper and found that when he said he had a coupon when he placed his order, they never asked him to hand over the coupon when he paid for the two Whoppers. He used that coupon WELL beyond it's expiration date and no one ever questioned either the validity of the coupon or its expiration date. Eventually someone did ask for the coupon, but he sure got a lot of free Whoppers in the process.