I know it seems kind of funny, but constantly being told how you can look, not just your uniform or costume down to the details, but your hairstyle, your nail polish, your makeup, etc, can get very tired after awhile. You expect to be told what to wear, but even then the pantyhose and sneaker police get annoying. While working for Disney I got my hair cut into a Reese Witherspoon, Sweet Home Alabama kind of style (a Disney movie no less!) and my managers had to have a discussion with me as to whether or not it was appropriate. I did not get my haircut to rebel, or to cause problems, actually because I thought it would be easier working around the ovens and such to have short hair. It turned out that the problem was that I couldn't put it into a complete ponytail because it was a little too short. It was decided that I had to wear a headband with a hairnet (we wore hairnets anyways) to contain my new hairstyle. I thought all of this was just a bit on the rediculous side. There are much more important things to worry about than my hair, and I'm sure many other CMs feel the same way. You get the impression that it doesn't matter about any of the good things you're doing, that you're good at your job or that you're great with the guests, they're only interested in the stupid little things.
Cornrows are a very normal style for many African Americans, and to say that to let people wear a completely normal style leads Disney "to the hood" sounds pretty insensitive to me. Thanks God they loosened up a little bit, but there's a long, long, long way to go before their standards are "normal" much less sub-par.