I am laughing as I read through these! LOL...
One that I heard last December was this guy at Guest Services inside Islands of Adventure... Not sure if he was stupid or just a scammer...
He claimed that his ticket wouldn't let him get in Universal Studios park. The guy behind the counter says "well, you have a 1-day 1-park ticket and you are already inside a park"... the guest says "yes, I downgraded my ticket this morning... for universal studios".... mind you, this was already after lunch... they offered him the option to upgrade the ticket back again to a 2-park ticket and he refused saying he wouldn't pay more... even though he had already spent the day at IOA... LOL