It is an interesting solution if nothing else. What about capping the number of users or followers to 100 or 1000 other people? That is closer to how humans interacted for the vast majority of history since the development of language. If you think about it, it's extremely unnatural for single people to have direct communication to millions of people. Information can still spread from social group to social group. I don't endorse the idea, but I would be interested to see how it might work and how information would spread and ideas change.