There's a number of artists who have asked to have their art taken down from Danbooru, but still produce official artwork for various products. As far as I know, official artwork is rarely, if ever, denied non-commercial redistribution.
Shouldn't there be a provision to allow users to see official art, even if the artist's banned?
The top example here is Parsley (paseri here in danbooru), who releases artwork for Girls Frontline and Kantai Collection yet explicitly promotional pictures are still blocked from viewed just from the transitive result of being properly artist-tagged.