That and open an unmaned rental kiosks machine at the terminals that dispenses them not-unlike rail-way-media to use in the terminal, in the rental car, at motel, then to turn back in at destination terminal or a best-buy... of course an equivellent unit-cost-fee is tacked onto your visa incase it's never returned, but with a tamperproof chip, a super secure encription and a time-out set on its content via RTC - why not.

Maybe with a partner.

emit...