There was that year Princess Twilight Sparkle ran the show, and everyone was convinced Windigos were trying to break into the theater. Turned out someone just kept opening a window during a light blizzard. But, given the old filly tales of why Windigos show up, it did sort of imply how everyone was feeling about the quality of the play that year. That or ponies were just a wee-bit uninterested in hearing about the founding of Equestria again. I mean, they live in Equestria; why not spice things up a little beyond a history lesson.