Artists already now have to prove themselves as to not being AI because AI copies their style too much. This is a hobby for people's enjoyment, having to defend yourself from AI accusations would be pretty terrible for a place that's all about vibing and having fun. As is having your writing confidence being absolutely slaughtered by people saying "Clearly this is AI you need to pup up a disclaimer."
I've said this before, but I should say it again:
If I pulled my posts now for Azurine and compared them to the short story series I wrote of her back in 2021, they are frankly very similar (minus the use of em dashes I couldn't figure out how to put into a document until I realized I could make one on my phone easily but in its place I was overusing commas, regular dashes, and semicolons). Sets of three, the "not this, but this" stereotype, epansive description, etc., were all things I used, and continue to use, frequently. Likely because I learned the techniques from the books and stories I liked most. If I had someone accuse me of AI and yelled at or ostrasized for it, especially by the people I love writing with, because of the linguistic styles that I worked with and developed over years I would be devastated.
It's impossible to be certain what is AI and what isn't, and to let something that is supposed to bring joy to people devolve into accusations that would single others out who potentially haven't even done what they're being accused of is the opposite of being a fun hobby.
If you don't like someones style, then don't write with them. Simple as that. Rumors of "X had to be using AI so I don't write with them and I know that because of these things in their writing that are overused that I don't like" are not okay, though. Maybe that person likes the way they add emphasis, using em dashes, or didn't feel the need to reread to catch over used phrases because they typed something up quickly on a break and just wanted to get it out there. Hell, I've seen people make fun of someones use of character thought text or Itallics, so adding AI to that list of possible things to worry about others judging is not the vibe. There's way too much potential for people to start giving false accusations just because they happen to dislike someone for this type of content warning to even be applied.