I always found this stupid. Now i've never been to a school with security cameras, i think that would be illegal where i live.
I was always told it had to do with curtesy, and then i kinda lost it. How teh fuck is it rude to wear a cap or a hat while inside? it's like old norms for behavior that doesn't really make a lot of sense, but are still beeing "enforced" cause some people fail to think past "tradidion" We did this yesterday, and teh day before that, so we do it today.
I actually had a teacher who called me a morron for wearing a hat in class. But she was a retarded ***** anyways. She was a language teacher (danish, the native language of Denmark where the schoolw as and we all lived etc) and she couldn't even pronounce words correctly or spell right. I don't mind misspells normally, but when it's the etacher who's job it is to learn you to spell right, and has to correct your spelling it kinda sucks that she can have like 5-6 errors on half a page.
And even worse, when we had dictate (where she reads something, and we hagve to write it) there was always a few words she just couldn't pronounce.
Luckily i only had her for a year, and it was like 6 or 7 years ago.