Come to think of it…
Back in July when the stricter adult doujinshi guidelines were announced, there were posts on 2ch saying that the guidelines were announced because somebody was arrested and his doujinshi didn’t have the adults-only label on his book.
It does completely coincide with Shiyami’s doujinshi which was released in July and he didn’t have the label. I guess they were waiting till after Comic Market to announce the case to the public.
Right now I can think of a number of artists that need to brush up on their censorship skills… I hope no one else gets involved in this.