For anyone going to chaocgrey's page (at least on Mobile, but possibly on desktop as well), depending on your browser settings you may not be able to see any of the text until you highlight it.

Also, slim doesn't specifically claim that they wrote the story, but I do agree it's misleading (and kinda sucky) that they made no mention of the original author.

That being said, there's definitely no rule against posting other people's work here, and if nothing else it sheds some light onto TheChaosGrey's works, though only because Falquian pointed it out