So I guess no one in a dining party ever misses a meal with an ADR? I would not do this (add an extra person to get a better time for an ADR) if I thought it was going to cheat someone out of a table. But a table for 7 would still be the same table as a table for 6. Now if it was a party of 2 saying they were a party of 4 to get a table or time they wanted, that I would disagree with. But you can never convince me that Disney would cancel my reservation at the door if I said one in our party decided not to dine with us that night.