But to those that are making multiple ADRs for big groups (either having to get 2 separate reservations for the same place or in cases where you split up), I'd put them under different names just in case. I don't get why it's not done in the first place?
I don't know why it's not done that way by the people who split parties either. Each ressie should be made in the name of a person who is actually attending the meal at that particular restaurant.
In my case, I didn't do it that way for two reasons:
1) Booking the way I did was not against the "rules," as Disney allowed me to make every duplicate ADR that I did. When the pop-up window comes up informing you of your dupe ADR, you have the option of either deleting one or keeping both. I chose the Disney-approved option that ft my needs. It never occurred to me that it might be a problem for me later to do it this way.
2) In my large party, there is only one person responsible for handling ALL aspects of the planning - me. It would be exponentially more inconvenient to have to manage multiple logins and multiple ADR associations while trying to secure ADRs for everyone. Since Disney offered a set-up where all my ADRS could be stored under one name, I was thrilled to use it.
Of course if I hadn't been able to book this way I would have had to create multiple accounts (all still mine) to be able to still handle everything for may family. I would have done that, but happily didn't have to for these bookings.
I really hope they don't switch to a system like this in the future, incidentally, because all it will do is make it way more of a PITA for people like me handling bookings for large parties, while doing nothing to stem the flow of people booking duplicate ADRS for more "unfair" purposes. A person wanting to book an ADR in every park to have "options" would just have to use 4 accounts - and surely would.
I agree that having to use a credit card to secure ADRs might be a more effective system (though it would make things difficult for people who eschew credit cards). But it's a moot point in a discussion of RETROACTIVELY canceling legitimate multi-bookings. I doubt they will do it - but I really hope I'm right.