Because if we want to be taken seriously as a sport, we can't be dressing like Vegas showgirls. I wish I could find the (ESPN? Sports Illustrated?) article that followed around some of the little ones from CEA I think? It focused on the 8 year olds in crop tops and crazy hair and makeup. We were so mad at how they represented cheerleading, not focusing on the athleticism, but focusing on the dress and facials instead, but really we brought it on ourselves.
A few notes on the things I've picked up over the 50 or so pages I've read:
No one is going to measure uniforms at competitions with a ruler. It's a guideline for gym owners and uniform companies when designing uniforms. Obviously girls with really long torsos are going to have much more of their stomach showing. NCA College implemented some of these rules a few years ago and they still have crop tops, they just no longer have skirts that are 6" long that barely cover bums - something we've all complained about.
Maybe the senior only in crop tops doesn't bother me as much because my gym already does it, but it's not about the individuals, it's about the team as a whole. One 10 year old in a crop top on a senior team and one 14 year old with a full top on a junior team is different than a team of 10 year olds on a youth team wearing crop tops. Stop looking at how this affects an individual and look instead at how this portrays the sport as a whole.
It's also not that hard to stay quiet and silently celebrating for the 30 seconds it takes to announce the 1st place team after the second. I can show you videos of teams winning big competitions doing just that very well. You hold your teammates hand and bounce on your butt, freaking out in silence. You don't have to jump up and down screaming while the second place team gets their award.
The etiquette guidelines don't bother me that much - if they were released separately from the rules. As it stands now, they seems too much like rules that can't be enforced. If the USASF released it in, say, November, and said "Hey everyone, let's remember good etiquette and behavior this competition season" it wouldn't be an issue. There's no way to enforce a team wearing a t-shirt until they go to warmups, and you can't really tell athletes they have to be comp ready when they show up. I'm on an open team, we usually compete at like 8PM. I'm not doing my hair and makeup to sit in the car for 2 hours driving to the competition, arriving 4 or 5 hours early to chear on some of our younger teams. It's not happening, especially when check out time at hotels is noon on sunday and I don't compete until 8. Not all gyms have warmups, but gyms should be pushing their athletes to not look like slobs at competitions. Wear a gym t-shirt and yoga pants, not hot pink sweatpants or pajama pants, etc.