Not sure if this is a good idea or not, but would it be alright to motivate people who contribute images here to tag better?
By adding tag_better or something... when they barely tag an image.
A lot just seem to tag vaguely and most of the time leave the main focal points of the images untagged (unless it's hentai, of course ¬¬;).
Updated by Evangeline A.K. McDowell