If you call them out and they change their habits - GOOD. If you call them out and there is no response - then you have a choice to accept that content, or to do something about it.
Yeah I've done this and some people blank you, deny whole heartedly (no worries, I always say look I could be wrong and I'm not having a go but....) and in one case, absolutely gorgeous nuts at me and down voted me for a week in retaliation.
But it's always best to say 'look, I can tell I think, is this where you wanna go?'. Most people check their own integrity. It's okay to deny in embarrassment and then not do it again imo.
Interesting the end result was 'fuck who knows for sure?'.
RE: Explorations in failure - trying to get a LLM to detect LLM generated content on HIVE