User blog comment:IamJakuhoRaikoben/Sorcerer Magazine, Issue 28: April 2014/@comment-3424593-20140504011434/@comment-3987368-20140504073709

FTGM, it has nothing to do with "the rules set for this wiki". They apply the same standards across the board with other wikis as well. They don't allow nudity, which includes exposed breasts, buttocks and they don't typically allowed "simulated acts" so something like a gif of squirting juice out of a cucumber would be deleted. Only wikis that have a plot based around such things (e.g. Bible Black) are allowed to have those around, and those are the wikis which have entry warnings where you have to consent to the content, which Wikia claims they're not necessarily in support of. As to the issue of Rogue touching Yukino, I dunno why that was deleted, because it shouldn't have crossed the line so that's more likely a 1-off than a set standard. I'm not saying I agree with any of this, but that's simply how it is.

They even closed Kodomo no Jikan Wiki cause of its subject matter (well technically, they never specified the reason, but that'd be the most likely one).