Why are hats not allowed in school?

Seriously? I can't think of one good reason. Please don't say "Because you can hide weapons/drugs in your hat". You can hide drugs/weapons/whatever in your backpack, on your clothes. Putting any of those things in your hat would be ridiculous when there are a lot better hiding places. lol. The second best excuse I've heard is that it's all about gangs and their colours and stuff. Well I can see their point, if they were talking about a big city.... But I go to school in a rural area. So it's not like any gangs even exist where I live. I really think that the only reason hats aren't allowed at school is out of custom. That's how it's always been done, why change it? I believe that it's only a matter of time before they allow hats in school. It's individuality! D:< lol.