Why trolls won in 2016
gizmodo.com
gizmodo.com
That's not to say that moderated forums are inherently bad, but I think they should be like hacker news: geared towards specific interests with moderation in place to ensure things don't get too far off track. Facebook et al are not that; they are far too public in the sense of being "for the people" rather than being "for the person with certain specialized interests."
Of course its possible that the trolls fail because people online become too sophisticated to be susceptible to their tactics, but I don't think this is a realistic alternative when talking about Joe Public.