Used for any post from Pixiv that is no longer publicly available there, because the work was either deleted or made private. All bad pixiv id links return the same "The creator has limited who can view this content" error page, even for obviously-invalid IDs like pixiv #99999999999999.
- bad id
- topic #8453 - Tag discussion
- pixiv sample
- md5 mismatch
This tag implicates bad_id (learn more).