One of my favorite essays from the early 2000s is Clay Shirky’s A Group Is It’s Own Worst Enemy. It describes a dysfunction of on-line communities that is very familiar to us now in the age of social media.Communities often start as free spaces, but eventually chaos and harassment appear. Once they do, quite a bit of the group’s activity shifts toward rule setting and enforcement. Shirky described this process in pre-social-media spaces like The Well, but anyone who has paid attention to Twit...