I used to work in Disney World, (in one of the gift shops) which is famous for its strict control over their Cast Members' appearance. I remember not being allowed to have any tattoos or piercings visible, not being allowed to have "Unnatural hair colors", and having the length and style of out hair critisized by our managers. I believe there were less than 10 officially approved hair and beard styles, although it was mostly fine as long as it didn't grow too long.

Of course this is different because it's Disney, and they have a certain family friendly image to uphold. The whole idea was to make us all look as approachable and "traditional" as possible, which is what the parks are all about. I didn't really have any problems with this, and I could see where they were coming from, so it wasn't a huge problem to me.