disclaimer: tbf i'm not triggered by incest and play either only children or characters with siblings i don't think are compatible with them. so if i sound ignorant lmk. there's a 99% chance that if i played incest it would be a "these characters are related" AU unless i picked up more characters with siblings. i'm not that into incest as a kink but i'm completely open to "we're siblings now" AUs if a smut partner's into it.

so...

if you were to tag your character's relative on a shippy meme or vice versa, i think it would be polite to put "CW: INCEST SHIP THREAD" or something similar in the subject of one of the top replies.

idk how you feel about your whole thread being "branded" with "Re: CW: INCEST SHIP THREAD" in every subject just in case. i'm not in a game and i don't expect anyone to read my threads so i would probably leave the Re: stuff in a few of the top replies and then remove it. idk if other anons would disagree. it feels kind of embarrassing to me tbh.

i think playing incest in a game is too much unless you're in a smut game maybe. if you're in one, i would put a warning in the op like in memes. maybe make an opt-out post for people who don't want to have characters discuss the incest? i think memes are okay as long as you put a warning. for psls/musebox stuff i would maybe put a warning in the op but really, if someone wanked on you for psl/musebox stuff, they would get laughed at for being a petty asshole.