The article by Michael Erard discusses comments on the web, including a long look back at the history of interactivity on the site.
When we complain about comments, I’ve noticed, we do so as if we’re dealing with some emanation of human nature or the lusty democratic energies of the American soul. But when I went digging into the history of the Web to find out where online comments really came from, it’s clear that they’re the consequences of what was technically feasible at a certain point and how that feasibility was subsequently implemented. We tend to think that comments represent the culture, but in fact the distinct culture of commenting grew out of digital constraints. Given what Web users had to work with, comments were bound to get weedy.