I found such too. But the quality of discussion is sub par even when the original idea was good. Large share of the people who are still active on facebook see

I found such too. But the quality of discussion is sub par even when the original idea was good. Large share of the people who are still active on facebook seem to be types of people who have very few friends and like to shout their ideas into the abyss. Or alternatively very connected people who promote slogans to mindless crowd of agreeing zombies. It's mostly result of "your aunt sees what you just said" which means that you rarely see anybody genuinely argue anything. Because the feeling of your aunt briging up your facebook discussion from two years back at summer cottage is not worth it. Facebook is shitty at managing interpersonal connections, kinda weird at this point. Then the lack of dislike button keeps noise levels high from people with no aunts. Even the few actual discussions typically develop into pointless drama. Reddit has very bad problems with eternal September, but its not nearly brainless if you dig deep enough into subreddits.