Ok..I have a somewhat unique perspective here.
First: My credentials::
I was in some sort of marching band most of my life. Grade School, High School, and then eventually the University of Wisconsin Marching Band. I have done a TON of traveling with cheerleaders as part of a group representing a school.
Second, I have been to Disney a few times when cheer competitions were going on.
Okay - now.....I hold true to the belief that if you are traveling with a large group of people you have to represent not only your particular organization, but to your school/university and to yourselves. You always have to remember you are only one piece of a bigger puzzle. We were always told that there was a time and place for fun, and a time and place to be all business. Anytime we were by ourselves we could relax a little bit. If we were out in public, we were expected to act certain ways. I witnessed people get sent home on a greyhound for making hotel security angry.
Now, if those cheerleaders were on their own bus and wanted to cheer, that would be fine. However, if I'm on that bus and I have my 1-year old daughter sleeping on my shoulder and they're shouting at the top of their lungs, you better believe I have and will say something. At that point where your own logic can't tell you it's late for some people on that bus maybe it's time for you to not go out as a representative.
I have NOTHING against cheerleaders. In fact, as a member of a band, and the "band geek" persona, I can see how it's not always easy being part of a group that is largely on the outside of what is going on. Your job is to back up your team and your school. If you are there for a team competition, save the yelling for when it counts.
I have heard WAY too many negative reports about cheerleaders on these boards in the last few years. In fact, my wife and I now go out of our way to stay away from cheerleader season, because my wife knows I go absolutely crazy with the way their "group mentality" makes them think they can act.
Now, if you are a cheerleader - take this in mind. It only takes those few bad apples to wreck it for ALL of you. A guest can have one bad experience and complain to somebody about it. If Disney gets enough complaints, you can bet they'll think twice about continuing to host the competition, as it's not good from a PR standpoint. You want people to respect not only you but the sport and competition you love? Be professional. Be exactly what you signed up to be...be a bigger piece of the puzzle. Be adult. If you respect others, they will be more tolerant and have an easier time respecting you. If you disrespect others, you not only do not belong at someplace like WDW as a representative, but you do not belong as a cheerleader, because you are deliberately and maliciously going AGAINST everything that cheerleaders stand for.