since ListenBrainz has a different purpose than MusicBrainz (namely it's more focused on promoting music via recommendations and whatnot), I believe that release groups with only "Expunged" releases (or only Expunged and non-Official releases) should by default be hidden from the artists' page

the main reason I believe these should be hidden by default is because in nearly all cases of a release being expunged, the artist or label is not only not promoting said release, but actively removing and disowning said release. there should of course be a way to show all these hidden releases (MusicBrainz already does this for anything not Official or Withdrawn), and they should still be shown in personal stats and whatnot.