The wiki for hair ornament currently states: "Accessories used to tie or hold the hair together, such as bows or ribbons, are not considered to be hair ornaments. Hair ornaments are strictly decorative." Currently several types of hair ties implicate the hair ornament tag. If the current wiki is to be followed, then tags such as scrunchie and hair bobbles should have their hair ornament implication removed.
If we make this distinction between hair ties and hair ornaments, then as a suggestion the hair tie wiki should be expanded to included all types of hair ties and not just the basic elastic band type. Ideally the current hair tie images could be covered by a new tag named like basic_hair_tie, simple_hair_tie, elastic_band_hair_tie, or whatever we come up with.
If we do not want to keep this distinction between hair ties and hair ornaments, then the hair ornament tag should probably be renamed hair_accessory as it covers both functional hair accessories and purely ornamental accessories.