It seems bad for OpenAI to make this about latex documents, which will be now associated, visually, with AI slop. The opposite of what anyone wants really. Nobody wants you to know they used a chatbot!
Also yes, LaTeX being source code it's much easier to get an AI to genere LaTeX than integrate into MS Word.
I don't think any particular word alone can be used as an indicator for LLM use, although certain formatting cues are good signals (dashes, smileys, response structure).
We were offended, but kept quiet to get the article accepted, and we changed some instances of some words to appease them (which thankfully worked). But the wrong accusation left a bit of a bad aftertaste...
...no?
Just one Google search for "latex editor" showed more than 2 in the first page.
It's not that different from using a markdown editor.