Disney, in short, has long been notorious for its zeal in protecting its copyrighted properties, zeal so great it largely seemed to disregard any notions of fair use. (It could not, of course, ignore the right to fair use entirely.)
So Andrew Leonard's article, "How Disney learned to stop worrying and love copyright infringement" brings wonderful news. According to Leonard:
Disney’s expertise in nurturing, co-opting and, most of all, not cracking down on the many ways fans have embraced “Frozen” online is a template for how to thrive in a digital, copy-promiscuous, consumer-empowered environment. Disney, long one of the fiercest and most powerful defenders of strict intellectual property control, has learned how to let copyright go.
Well, at least a little bit.