I can think of quite a few DISadvantages unfortunatley. When the thought of making ADR's online crosses my mind, I think about the ease and convenience it would be for all of us, but I can only imagine the irresponsible and obnoxious people that would make tons and tons of ADR's, booking 10 times at one restaurant or doing double bookings. We all know there are people out there with nothing better to do than to create phony ADR's. lol
Sure, requiring a credit card to guarantee reservations would certainly eliminate some of the double bookings, but leaving it in the hands of the "public" (not including many diser's) makes me nervous.
Plus, I just don't mind calling Disney Dining