snpthecat said:
A close equivalent to the crossgender tag category uneasiness is incest_(lore). But it's on the other side of the coin, where it's been decided that it's the artist's opinions that takes precedence over the canon. This might cause problems in let's say, a hypothetical where artist draws family members from popular media having sex, but stating that in the image they aren't family members.
I mean, it's always kinda functioned like this, even before lore tags existed. usually it mattered more for characters whose familial status was unconfirmed, ambiguous, or inconsistent in source material, like with the koopalings. also, I don't think there are actually that many (if any at all) artists out there, drawing porn involving two characters who are solidly depicted as related in the referenced media and then saying "they're not related in my art". if I had to guess the inverse case is probably more common.