Unbeknownst to me, my school has a closing travel agent program. One of the ups to the program is that they have a fully interactice Sabre system for training their students, and the only limitation is that they cannot print tickets. My prof was telling our air transportation class about the lab techs who were well versed in the system... And what did they do? Booked a bunch of cheapie fares across the US, flew them, got a bunch of FF miles, and then took them and when to Europe. Most of the class thought they were nuts, I just smirked