I've just been listening to a piece on the radio about uniforms, and punishments in school in general, from the perspective of a psychologist (and mother).
What stuck out for me was her point that raising/educating children with the idea that life is going to be incredibly punitive isn't a great idea, and that understanding how to question things properly and rationally is important.
This reminded me of one of the more ridiculous detentions I got as a kid. We were playing cricket in the playground, using a plastic bat and a tennis ball, which was allowed, but I leathered probably my finest shot ever and smashed a teacher's car window. The teacher's wasn't supposed to be parked where he was, but I got a month's detention for it.
My protestations that I'd done nothing wrong fell on deaf ears. My parents were raging. Fun all round. The (sort of) irony was that it was my history teacher's car, and I ended up winning the history prize that year, although some concerns were expressed about my morbid curiosity around mediaeval torture.
As for those signs, I quite like them, especially as I hope they've been done that way to make a point.
"Now look girls, these signs are all over the place. They just won't do. We have standards don't you know!"
"Yes sir, but maybe if we'd spent more time on being educated than worrying about some proto-fascist wandering the halls with a tape measure we'd have written them properly."