Sacred Haven of Debauchery

If we're talking about the censored version, the game has many similar costumes, even more revealing ones. I can't exactly remember who wears them now, but against the backdrop of so many costumes, such details don't stand out, unlike the lack of clothing.
And since you knew about that map, because you chose it somehow, apparently you'd seen it before, but for some reason you ended up not sending the original. It just seems a bit odd that you supposedly thought it was original, yet somehow managed to find that specific one. So you're saying you didn't know such a map existed, but you found it anyway? That part isn't entirely clear.

But nothing points to it

Face/physique. In this case, the norm/average is taken as the baseline, not individual cases.

And when you saw the pic in the contest, your first thought wasn't "maybe this is an isolated case," but "oh god, not again, this damn pedophile(s) sending their pics"?

Given the experience of past contests (in terms of content) and that this is HeroesWorld, along with the kinds of "jokes" that have been in contests over the years, then yes, I didn't think otherwise. I assumed it was just another joke.