LOL - sure with some professional research they could figure it out, but the bottom line is they won't. A check-in agent is not going to be bothered to wasted everyones time asking for a microfiche search. They also cannot easily look up flight segments by ff number. All things considered, it is not hard to slip past them with this one... and again, when in doubt use the kiosk. It would issue a bording pass to a penguin if it had an aeroplan number.