Migrants to IJ, 2007

Someone submitted a Harry Potter fanfic to test the rules. In it Harry spelled himself to be about 14 to engage in kinky sex with his lover. (That was pretty much the entire plot from what the author said). That was fine. When she took out the fact that it was a spell then it wasn't fine.

Interestingly the abuse team couldn't tell her whether it would be fine without the spell in it without seeing the edited version. If they actually had comprehensive guidelines you'd think they could...

So it looks like they're going with the 'I know it when I see it' definition of obscenity.