So, it wasn't here on Bluemoon, but I caught a writing friend using AI to reply to my post. It was very disheartening and led to a big debate between us. I am completely against it (other than maybe for grammar and brainstorming).
I used an AI detector as well, which I know isn't always the most reliable, but it flagged everything my partner wrote. Personally, if I wanted to write with AI, I would do so directly. I'm not sure why someone who is a hobby writer would use AI so heavily, but I'm concerned as an RPer that I already caught someone using it rather confidently.
It is unfair if I put a lot of thought, time, and effort into writing for someone to get back to me in minutes. If anything, I enjoy the human charm of RP; imperfection. A typo here and there is fine, and I love when I notice my partners' writing tics. Also, I look at RP as mental chess. If that is psychological, battle, being clever, seduction, world building,, etc... and AI can take that thinking out of it.