Interesting question from: #WritersCoffeeClub day 17: Should modern writers worry about proving their work is not generated by an LLM?
My answer: Only if their writing is vacuous. As @kagan writes, the "tells" of AI "writing" are a moving target, but vacuity is still a strong indicator that something is probably written by AI, and if not, that it's almost certainly slop and not worth your time regardless.
Just don't write slop, or if you do, don't publish it.