Ha-Ha-Ha
Not all customers are the worst, there are actually some out there that get a bad rep because of other people. More often than not customers don’t actually intend on being annoying or rude, it just comes across that way.
Anyone who has ever worked in customer service is well acquainted with the “if it doesn’t scan it must be free” line. And even though it is super annoying to hear over and over again as the person standing behind the counter, the people that say it are harmless.