This drives me bananas! Or the dressy coats for outdoor play that have only buttons and no zipper so the cold air goes right through them. Poor kids stand their with their hands in their coats in their little high heeled boots to cold and fancy to move a muscle.
I now take all hair accessories and put them in their bin upon arrival as they will end up lost by the end of the day anyway. Also on the days that DCKs wear super fancy clothes here we tend to do A LOT of messy exploration, crafts and painting activities.
They eventually get the hint.