If anyone thinks women in Saudi Arabia or anywhere else where burqas are de rigeur for all women are free from harassment, they need to think again. Changing a uniform to trousers just opens up other chances, for people who are going to do it anyway no matter what the girls are wearing, to make comments about size of rear ends, thighs, whatever. If women keep on retreating, we will eventually live in a world where we can expect acid attacks as a reprisal for having the temerity to think girls should attend school at all, as happens in Afghanistan.
It is sexual bullying, and it's going to happen because under all the clothes, no matter what they are, there's a female -- and under the other clothes there's someone who thinks this is acceptable because other males do not stand up to stop it. This will not stop until men redefine masculinity.
I really like the idea of naming and shaming, though, and posting pics on the internet. But I think men have to stand up and be counted on this issue.
"The Yorkshire ripper killed a schoolgirl because she was wearing a split skirt so he assumed she was a prostitute and killed her."
I believe a rephrasing is in order -- The Yorkshire Ripper had thoughts going on in his own head wrt prostitutes/women/sex so he killed a schoolgirl wearing a split skirt. In other words, because he was a psychopath with severe psycho-sexual problems.
To assert that the split skirt had anything to do with it is to assert that women and girls should try to guess who among the men and boys on the street with them is a psychopath with murderous intent and then require them to guess what clothing or makeup or hair colour or shoe style is going to set their madness off, and then dress to avoid the perpetration of a crime. It is to assert, essentially, that the girl in the split skirt could have prevented him from killing her if she had only worn a different skirt.