A caller just mentioned the banner while talking about how he, as a CUSTOMER, has no recourse with the Chiefs.
He said, "if you buy something in my store, you bring it back and I give you your money back".
He said something REALLY interesting as well - Cassel is taking the boos for both himself AND Pioli. Pioli never comes down to the sidelines or anything. So the fans CAN'T BOO him. They have no avenue to express their disgust to Pioli.