Just about any forum thread that goes on for pages ends up in an argument. I think this can be avoided with strict rules and users who reinforce the culture.

As far as reddit goes I find the larger the number of subscribers to a subreddit the worse it gets. However depending on the topic of the subreddit even a niche small subreddit can be toxic in some way. This tracks here as well.

I would like to see more discussion about an artificial technical or skill barrier needed to participate on a website or service. This might sound elitist but keeping "normies" out goes a long way to helping keep the discussion quality high. Even having something as simple as an "ugly" more text based interface helps.

I used to think everyone should have access to the internet back in the day. After that happened I changed my mind