Why not try this as an experiment: instead of assigning the 'A-B-C' classes when we check in (whether on-line or at the airport), why not assign the seats at the time of check-in (not at the time of the reservation). That way you keep some of the attributes of the current system, and encourage people to make early check-in's, while also ending the 'cattle-call' proletarian image and avoiding the undesirable lines and unruly/impolite line-cutters.
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