Hell no, upstanding kids in school wearing bandanas. :ninja
It doesnt matter much how the kids are. I am sure there is a school policy in place which tells students and teachers what it NOT allowed. If there isnt a clause in it which says you cant wear this on these days, then the kids were right.
this is what happens when people try to make rash, quick decissions and try to back pedal their way out after it explodes. Sure they could say it was a saftey thing, and say it would start fights and it was for their own good. but unless they straight out said that to the kids from the get go, its nothing more than a back pedal.