I experience this too, but the danger is is making assumptions based on "tells" which might just be how the user wrote the post. It's a situation now where if someone authentically writes something, but happens to rub up against some arbitrary "tell," they flip a bit in the reader and get their work rejected. For example, I used em dashes fairly regularly in my writing before AI started convincing everyone that the mere presence of an em dash is the AI tell, so I actually stopped using them, just to avoid this backlash.