The way the author of this comment has written A/B/O is also offensive slang for Aboriginal Australians. I'm sure it's being done innocently and I don't want to start wank, but it's always a bit of a shock when I come across it this way on meme. Is there a gentle way you could ask people to remember the punctuation?
I agree with you that this was a perfectly innocent mistake, brought about by someone not knowing about the slang term. I think the context makes it clear that they were speaking about an a/b/o story. Nevertheless, it's an easy enough thing to screen in the future. I commented asking meme to avoid spelling a/b/o without the slashes and to contact the mods if they see this spelling in the future.
http://dekedangle-rpfanon.dreamwidth.org/6092.html?thread=27923660#cmt27923660