That makes me wonder two things. Firstly, if your can use this to find LLM generated content, which I guess would need similar instructions. Imagine instructing it to talk like a pirate, it would be quite different from a generic response.

Secondly, if you want to make an alt account harder to cross-correlate with your main, would rewriting your comments with an LLM work against this method? And if so, how well?