Duly noted GlueBall. That's why the airlines are sticklers for paperwork. I'm quite sure the balk at paying the fines and returning the passenger.
I was in London with my family, my sister was 15 when she went but turned 16 during the trip. The airline wouldn't allow her on the aircraft as she required her own seperate passport (she was traveling on my Mother's passport) but couldn't get her own until she was 16, as she started the trip at 15, there was little we could do. In the end, we got a friend to meet us at YYZ with her Canadian Citizenship paperwork to prove she was Canadian.