When I look at https://lemmy.ml/c/startrek vs https://kbin.social/m/startrek I see two entirely different lists of posts. Why? It’s the same topic, just on different instances. How can we have communities about topics without having them siloed into their own instance-based communities? Is this just related to that 0.18 issue with Lemmy/kbin not talking nicely, or is this how the Fediverse is?
Is it (at least theoretically) possible for me to post an article on https://kbin.social/m/startrek and have it automatically show up on https://lemmy.ml/c/startrek, or are they always going to be two separate communities?
Some form of aggregation may still be possible. Be it user by user, or server by server.
But like I said in another comment, for the fediverse to work the way you imagined, the total number of people doing content moderation would have to be orders of magnitude greater than even facebook’s or twitter’s.
Additionally the way it works is not mutually exclusive with differing ideas, only, in the way it actually works, instances that agree on moderation policy, can pool their efforts. Only where there are differences, are different communities and different moderators, needed.