You said you did no judging, but your above quote shows you did. Just because they are Disney characters you assume that they should be held to a higher standard than someone at Six Flags portraying Bugs Bunny? Also, you judged that they deserved to be fired...which they were.
Unfortunately they were wrongly fired, as they did nothing more than blow off some steam at work, which we all do in some way. The only one who should have been fired was the cameraman/woman as they were filming backstage which is a clear violation of Disney rules at any Disney park.
As for editing my post, I meant to add to it but I cleared it by accident. Nothing more sinister than that...