The thing I don't like about this is that by forbidding girls to wear skirts at school, schools are shrugging off the responsibility of teaching their pupils that looking up a girl or woman's skirt is unacceptable.
I have no trouble with schools' stating what length of skirt they find acceptable. Yes, we turned down the tops of our school skirts on the way home when mini-skirts came in, but we knew they had to touch the floor when we knelt during school hours.
Here in Denmark where we do not have school uniforms there has been a running battle for years between schools and parents regarding teenage girls displaying their bare midriffs, or about half of their bosoms and boys displaying half of their bare bottoms, when it was fashionable to wear trousers at "half-mast".
A male colleague asked me to have a word with the mother of a fourteen year old girl who wore mini-skirts and sat with her knees apart. He was scared silly, he would be accused of inappropriate behaviour, as he could see the crotch of her panties! I obliged, and the girl's mother was offended, even although I pointed out that we were not criticising her daughter's behaviour in any way, but that male teaching staff are very concerned these days, and rightly so, that they might be accused of impropriety.