Well that would be one way to bring the airport checkin line to a screeching halt when you give the AS agent your photo ID and the DOB doesnt match what they have...if they notice
Well, I definitely don't give it when I make a flight reservation. Is it really part of what they have on their screen?
Of course, integrating the loyalty system with the software that agents use would be one way to personalize service, depending on what the personalization is.
Don