When someone starts a thread that is based on false information, misinformation or where context is needed otherwise a false impression would be given.
I mean I am sure no one ever starts a thread using misinformation or where context is missing, but if they were to do that, then a note added to the first post with context - as you get on Twitter.
There would be posts afterwards which might lead people to the same view - but to save people the effort of having to read all the posts to see if the OP was misleading others, then a community note could work.