Look, I'll give you an example of a situation where I KNOW that what you are saying isn't true, and where I think having a thread here did a lot of good. So we've had a thread here for a while about a prominent Anime and video game voice actor, Vic Mignogna, who last year had a bunch of allegations come out against him for sexual harassment, assault, grooming under age fans, just tons of gross shit. This guy has had rumors about him swirling around since I was going to anime cons in high school, so about a decade. But he was popular, he had a fanbase he had tailored specifically to shutting down and harassing anyone trying to speak out. Most of these allegations happened on Twitter and a movement started called #KickVic to get him banned from cons and gigs, but Twitter isn't a good place for posting permanent resources. Tweets get deleted, accounts get closed because of harassment or shame surrounding being an abuse victim, etc. So a user here made a thread about these allegations and the later lawsuit he would file to try and silence his victims. If you Google this whole situation the thread here is one of the first results. The thread has tens of thousands of views. It served as a constantly updating resource on the case, his attempts to silence victims, and how his toxic fanbase was lashing out at his victims and anyone from the industry who stood with them. That thread served as a very valuable resource for anyone trying to find out what was going on, and was free of any of the FUD his followers were trying to spread to discredit victims.
That's just one example, and Sibersk Esto deserves major props for keeping it up to date for so long.
I'm aware of that thread; I remember being surprised more than once to see it back on the front page. I'm glad you were able to generate tangible results!
But I think you'd likely agree that threads like that are the exception rather than the rule. Is it worth the negativity for the one thread in fifty that creates those kinds of results? I don't know. Maybe it is.