i dont see the problem as long as it's explicit that it's 18+, but if you had to make this post, surely you can sort of see how it might hint to underage.
One of the RP subs on reddit required a disclaimer in every post, something like:
I am 18+ and so does all the characters and people involved.
I found it kind of annoying since posts without it would be auto-delete. Sometimes one forgets to add that.
But if that's what it takes, oh well.
if you had to make this post, surely you can sort of see how it might hint to underage.
I made this post because this forum shares the name of a subreddit which has a rule against high school settings regardless of the ages of the characters involved. So no, I still can't. Enlighten me.
95% of high schoolers are underage. Setting a story there thus "hints" that the characters involved are underage unless otherwise stated.