Sorry I don't think dress code has anything to do with length of hair and still think it is sexist and discrimnating unless you say everyone. If they want to say it has to be a "normal" color that is one thing.

And Im not sure about MN but in AZ.....I would say longer hair is more the norm in young MS boys....at least at my school and most the younger boys on the Disney and Nick network. Just me though......