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.

I am so glad to see this thread! I am making my ADRs next week. At this time we have 7 in our party - 4 A, 2 C, and 1 infant. There is a chance that my MIL might be joining our trip - at this point she is not invited because of her behavior on past WDW trips. Anyway, I didn't know whether to make the ADRs for 7 and then possibly try to add 1 person if we decide to be nice and invite her, or make the ADRs for 8 and cancel 1 person if she does not join us. 
