Did they have any way of preventing the funatics from using more than one pass?
Hobbes: "What's the point of attaching a number to everything you do?" Calvin: "If your numbers go up, it means you're having more fun."
^They're fun-addicts. No way can they stop at one! ;)
You print out a voucher for the exit pass, then you take the voucher to a store in the park, they scan the barcode and then give you the exit pass. I was actually surprised they did that, but I guess they realized it was set up for abuse otherwise.