USENET was legendary for trolling and combativeness, but I also had some of the best online discussions I have ever had there. I've been on forums that have degenerated into nightmares, and forums which were great. Same with BBSes.
I had written some other thoughts about group focus and leadership but deleted it all because, in 2022, none of that will stand up to discussing politics. Take a forum of people who get along great talking about a topic they love and the moment you say something political they will be at each others throats.
This is by design. The political class has created a situation where part of your identity is disagreeing with another group of people, no matter how reasonable they are being. It's so potent that foreign governments are now weaponizing it.
Social media creates drive by interactions with people whose knowledge of the topic may be nonexistent, whose interest in learning more may be nonexistent, whose interest in understanding what other people think is nonexistent, and who may just be straight up stupid.
They are there for the dopamine hit that comes from feeling right and putting other people down. They assign an individual an entire belief system based on one comment on one topic so that they can classify them as the enemy and easily dismiss any uncomfortable questioning of their own views.
I miss talking politics online. I found it enormously useful and changed so, so many opinions that I held when I was younger. Now, even smart and knowledgeable people won't engage because it's no longer worth it. I have deleted countless replies because as soon as I started writing, I realized that I would have to spend so long explaining what I *wasn't* saying, it didn't justify the time based on the minuscule chance I would get something useful back.
The most successful groups in any online discussion medium now are the ones who don't allow discussion of politics.