Intellectually curious people tend to seek a diversity of thought and opinion. The important thing to do is to support this tendency. I've come to realize (and have been brought around to the opinion) that tags are a useful tool for improving diversity of content. I have no control over who is going to post an article tagged #economics, and it ends up in my feed. No one has control over it. I used to fret that tags introduced a community aspect to Hubski posts that would lead to a tragedy-of-the-commons (subreddit death by popularity) effect. However, my thinking on it has evolved.

People that typically flock to a topic are those that are curious about it, and/or those that have a personal stake in it. More so than a lack of diversity, ideologues can bring about an echo chamber. However, to do so, they have to be able to control the content that others see. If the overall effect of users seeking and rewarding diversity of content outstrips the ability of others to suppress diversity, then we should be able to avoid them. At this point, I think we are ok.

Of course, I could be wrong about this.