1) Disney is getting wise to the "but, they decided to join us".
2) People can't always get the ADR they want.
3) So, they under-count to get a table.
4) Then, they show up with "unexpected" additional people.
5) In a team meeting, CM's have been told to warn guests against this.
6) If there is room, WDW will not turn away revenue.
7) But, if busy, they will turn away the additions.
8) Go ahead any arrive with the extras, if you like.
9) Just be prepared to have someone stand around while you eat.
NOTE: The exception to the above is Tusker House. They have made a
local policy that no one with an ADR gets turned away, even if they are
packed. They will find a way to fit you in, even if a) you are late for ADR,
b) you show up with more people than on the ADR, c) you even show up
2-3 hrs late for the ADR.The eatery wants to be more guest-sensitive.