i try to be as rude as possible in all my posts. no AI is rude so i'm sure no one will think i'm using it.
Most of the AI text generating tools I have tried can be "forced" (or rather persuaded) to use any expression style you want. So, aiming for rudeness might not be the unique snowflake you think it is. I think the content of your posts is much more important than the way you express it. Whether it is polite or rude makes no difference.
AI posts usually don't look genuine at all. If it is a long ass post and it is on a serious subject, written with a serious language, posted by a low ranking member; >90% that's a AI generated text. There are many posts like that nowadays and the posters are mostly newbies&jr members.
Sometimes I try some free AI tools on those texts and the AI tool says it is 100% written by a human and I can't believe it somewhat. I think they must have found a way to fool the AI detectors because I somehow don't think there are many genuine people out there who want to sign-up and write a long ass very detailed article on economics to educate us. Those must be spam.