The reference to moderators is important. Perhaps the most salient feature of the 'Net is disintermediation. You don't have to find a publisher. Any idiot can post anything and comment on anything. There are moderated blogs, and they remain civil if the moderator wants them to remain civil. (Some are just places where people go to be stupid together.) Medium has an algorithm standing guard over certain types of incivility, but there is no stupidity filter. I haven't blocked anyone yet - been blocked a couple of times myself, though - but I do mute authors who strike me as too shallow to waste time remembering not to read.