I know how this feels first hand. In the 6th grade my parents sent me and my two younger sisters to a private school. The Dean was pretty strict, but we were getting a good education, a lot of individual teacher attention and really exceeding in our studies. The second year the Dean decided that we (the students, not just me and my siblings) were rebels that needed to be controlled, which he thought he could do through a strict dress code. The kicker was that it was to be enforced even when we weren't at school. We (supposedly) were not allowed to wear jeans (ever) and the girls had to wear skirts or knee length shorts, always. Even on Saturday. That, and no "excessive jewelry".
We didn't stay much longer. These poor kids in the article though.. I don't imagine they have that luxury.