Exactly. And Disney World is a place of public accomodation: private property that anyone can be on under conditions determined by the owner in compliance with laws regulating such places. So while Disney World is private property and can determine its own rules and procedures, it is no less a public place. As such, there is no expectation of privacy. There is also no law that prohibits the filming of people (in a public place) without their permission. The signs for filiming are set-up in public spaces to warn people that they will not be compensated if they are caught on film. It's nothing more than a deterrent for people who would purposefully try to get in a film and then later make a claim for compensation. The only real claim Disney may have revolves around trademark. And that might not even be a claim (since I haven't seen the movie I have no idea what is shown). Of course, Disney can ban those who were on property and violated their policies, but they don't have any other type of legal recourse.
It might make Disney more weary of people who are filming with video cameras, but I doubt they will issue a complete ban.
Agree.
Yes, MK is private property, but if they didn't want anybody to film there then they could put up a big "Private Property Do Not Enter" sign up at the entrance. But obviously the parks are opened up as public spaces 365 days a year, (as somebody noted, different from public property), so while they make $$ off of it being a public place, such as a movie theatre, there are certain rules and general rights that the public has.
One thing Disney could do it make guests sign paperwork (or perhaps fine print on the ticket) which says that they will not photograph/videotape anything in the park for commercial profits. Though this might raise Frist Amendment and criticism/commentary issues, I think they could legally do this, and then try to use this to block a future film (if there is one). Would they do this? Risk angrying guests who don't intend to do the company harm but don't like that Disney is breathing down their necks? No way! They'd risk losing millions of dollars, tens of millions of dollars due to bad publicity, to say nothing of actually approaching guests and asking them what they're doing with a camera!
Absent such agreement between guests and Disney, the general law applied and there doesn't seem to be an expectation of privacy. In the Cindy's case, she is a face character who photographed thousands, tens of thousands, hundreds of thousands? of times during her employment at Disney. She knows that she will be in countless family albums and home movies. I think the most she could do would be to file a lawsuit for some of the $, if any, that the film makes, but she isn't really acting, just doing her job. If I shoot a film where a guy drives a bus through a scene, and he's just doing his job as a bus driver for the city, is he also entitled to compensation just for briefly being in the film? Obviously her "role" might be bigger, but she still isn't a main character, IMHO, based on what I've seen.