

I mean it kind of already does this accidentally, just look for em dash and/or emojis sprinkled all over the document and you can be pretty certain that it was AI generated.
The other thing I’m seeing here is that this will only be effective for large chunks of text, if you’re dealing with small snippets interspersed with human generated content there will be enough statistical noise to make classification hard without introducing a bunch of false positives and negatives.

It’s the exact same problem you run into on any open or semi-open market but the outcome for anything with a good user review system will be the same. Look at Steam where asset flips and low quality clones flooded the store but 99% of them barely get a handful of sales if any. Instead all the money goes towards the games with actual fun content. People recognize low quality and low effort slop and AI reeks of it.
The only thing flooding markets with slop does is it makes it harder for the small gems to get discovered. Some of them still will, they happen to catch the eye of just the right person and spread through word of mouth, and the big companies will just shovel heaps of money into advertising, but it makes life miserable for the little guy trying to make a name for themselves.