Thread:Snake-shake/@comment-265082-20181023012229

The purpose of Category:Manga Chapter Images is to organize images from the manga, it is a sub category of Category:Images, it is not meant for articles.

The Category:Spoiler should not be manually placed it should be automatically added via the spoiler template. And it kinda makes sense to use on a character page, where is you read too far there would be spoilers, but not on a chapter page or even an episode where it is known to be sequential. 