What do people have against headwear?

Okay, I understand the need for safety, but I think this goes a little far. For those who don't want to read the article, UK colleges are trying to implement a "hoodies down" rule. The primary reason for hoodies, may I remind you, is for use as both a sweater and a head warmer. I can't tell you how many times I've seen normal, non-gang students wearing hoodies to keep warm. But maybe that's just in the States. Still, this combined with the history of controversies over the wearing of Islamic head scarves makes one wonder if there really is a ploy against headwear. Many schools already ban hats, so if we have no hats, hoods, or scarves, then are students expected to just lose massive amounts of body heat in cold weather?