Those people broadly fall under "the Oxford professor" catch-all phrase. Obviously. I was talking about 99.99% of random internet texts, which do not conform to any Manual of style and are not written by literature majors. If I see a text authored by some known figure or in a respectable journal/site, then I don't have a task of detecting LLM slop in the first place. But when I do want to know if the text is generated or not, it is usually written by less sophisticated crowd, or anonymous.