That's what I want... this would force me to make a different account for every topic I might comment/post on, and they can have their own local networks. If it's a topic that I know a lot about (eg what I do at my day job), it would force a fresh start every few years.

This is in contrast to my twitter account, which is such a mess that I don't like posting b/c "most" people who will see it followed me for some other topic.