I would say that if someone enters the theater and takes a seat, it is their seat. If they get up to go to the bathroom or to get a snack, it would make sense that they could come back to that seat. However, if someone else comes into the theater and claims a seat for a person who has not physically taken possession of it, it's then it's a seat being saved for a party yet to arrive, and that is against Disney stated and printed policy.
It doesn't seem too much to ask for a party to arrive together at the theater to claim their seats. It only creates animosity when some people think they're "special" while the rest of us are adhering to stated and printed policy. It would be nice if CMs enforced it, but it seems they won't unless those who are being denied seats start complaining on the spot and have the CM tell the offending party that they will have to wait until their entire party arrives before they take seats if it's important that they be seated together.
It doesn't seem too much to ask for a party to arrive together at the theater to claim their seats. It only creates animosity when some people think they're "special" while the rest of us are adhering to stated and printed policy. It would be nice if CMs enforced it, but it seems they won't unless those who are being denied seats start complaining on the spot and have the CM tell the offending party that they will have to wait until their entire party arrives before they take seats if it's important that they be seated together.