Anonymous wrote:teacher here (middle school). Tongue in cheek answers aside, it's just too much distraction during the school day, at least for the older grades. We have many (many) kids who would use this as an excuse to wear a) sexy/slutty (naughty nurse) or b) purposely controversial outfits (f/e, a boy wearing a strapless prom dress).
I personally don't see anything wrong with having little kids dress up on halloween-it's only one day, after all. But for older kids, it's not really a good idea.
When I taught 1st grade a few years ago (2007-2009), I had to deal with the inappropriate sexy costumes. I had 6 yo little girls show up to school in midriff baring Miley Cyrus costumes, a flapper complete with a fake cigarette in a cigarette holder, what I thought was a mini hooker or stripper (fishnet tights and a strapless, glittery tube top worn as a dress) only to be told that she was a super model. The little boys were things like the Grim Reaper! 5, 6 and 7 year olds! I never thought I'd want to censor Halloween until then.