I think this classification of "trolls" is sort of a truism. If you assume off the bat that someone is explicitly acting in bad faith, then yes, it's true that engaging won't work.

That said, if we say "when has engaging faithfully with someone ever worked?" then I would hope that you have some personal experiences that would substantiate that. I know I do, I've had plenty of conversations with people where I've changed their minds, and I myself have changed my mind on many topics.

> When has "talking to an LLM" or human bot ever made it stop talking to you lol?

I suspect that if you instruct an LLM to not engage, statistically, it won't do that thing.