Uh, are they really useful? They seems to be more there to mess when you want to tag something like hair, shirt, etc color and have to clean "-dragon -mythological_creature -mythological_scalie -mythology -scalie" every time if you do it wrong...
Like there is this post here (young tag warning), both me and other user were trying to use a "color_fur" tag but because the priority is for "red/green/gray_dragon" etc we had to take out the tags talked above.
https://e621.net/post_versions?search%5Bpost_id%5D=5392743
Is there any chance of taking out these tags or at least make a new "red", "green", "blue" tags that just aliased to "invalid tag" so there is less tags to take out when this type of tagging error happens?