As a practical matter, I think they're paranoid you could be a business traveler who's trying to dodge having to buy an exorbitantly priced paid ticket. Even a Saturday night stay restriction doesn't seem to calm their fears there (CO is an example).

"Expedite" fees are no longer necessary because they can't claim you owe them for having to drop everything, print a ticket and send it out overnight like in the old days.

This is a classic case of airlines trying to artificially block consumers from receving benefit from new technology and systems. They deserve the bad P.R. over it.

Next up: Reinstating "lost ticket fees" for e-tickets if you can't present a hardcopy receipt at the ticket counter!