One point some of you are forgetting is that when a teacher quietly pulls aside a girl telling her that her hair is too long, there will invariably be comparisons and kvetching of “why just me” etc. — behavior every parent with more than one child is familiar with. Rulers don’t lie, so it’s actually easier for girls to accept.
Additionally, since the hair was measured before the school year started, there’s really no embarassment involved since no rule was broken yet. And hair, unlike Yarmulkes which was used as an example, actually grows. Which means it’s very easy for it to become too long. So among her peers, parents and faculty it’s taken in stride, with no reason for shame.
Yes, once taken to task, it needs to be corrected to follow the school rule, but girls generally make light of the whole issue – whether we want them to or not – or worst case scenario give an exaggerated sigh…
Most of you are overestimating the fragility of our Bais Yaakov girls.