I for one really dislike things like this showing up in my acitvity feed (suggestive covers) – For example, 女子更衣室 | L17 made me switch to a “me only” mode in the activity feed after I tried to even block the user who interacted with that on my activity feed to make it gone 
(which didn’t help, sadly.) To me, those look like minors in a sexual setting (idk what it is really, but I think many people could draw this conclusion from how they look + school uniforms) which is not ok in my book.
Edit: IF this is really lolicon (I really don’t want to investigate this further because it gives me the ick), then there’s an additional layer of this being illegal in some countries too.
