I found some posts from source:http://kusuguri.kir.jp/. That URL is listed in the banned_artists artist entry, so I started flagging them. However, I can't find any forum post announcing this ban, and there's no actual artist entry with that URL, so I'm wondering if maybe http://kusuguri.kir.jp/ (or, to be more precise, http://kusuguri.kir.jp/toukou/illust.html) was added to "banned artist" by mistake?
(For what it's worth, the artist's name is listed as "一介のくすぐり好き" on that site, but as "犬吠埼一介" on their new site and both his blogs: http://inubousaki.ldblog.jp/ and http://inubousaki-kusuguri.ldblog.jp/. None of these last three sites are in banned_artists, so that's another reason I'm doubting. If there were an artist tag for him, it'd be inbousaki_ikkai.)
Updated by S1eth