Disneys trademarking a holiday? really....

After reading an article about disney trying to trade mark the "holiday" or "phrase" of "Did de los Muertos" I've learned that they could actually do that but only if it had some sort of Pixar only theme. I've also learned that Pixar was planning on making a day of the dead movie. Lastly I've learned that they have withdrawn from this idea. The article was very informative because i had no idea this was going on and I'm glad it didn't happen. Lastly I liked that they had a segment a with a copyrights expert near the end. Is disney going to far with their power?