I spent several weeks thinking about this exact idea.

Federation is cool. You could set up each instance to only federate with instances for nearby towns and cities. Maybe a “2 district” radius. Users would only see content for their local communities. Local news stays local. Local government could officially participate if they wish. People you talk to are actually neighbors you might see in person. Larger regions like counties, states, provinces, or even countries, could also have dedicated instances and federate similarly. I think this is the big appeal and it sounds awesome!

There are a few problems 🙂

First is a little bit of confusion with posting. Let’s say that I see a post about a cool new restaurant in my town. I share it with a friend who lives a few towns away and that’s outside the “federation radius”. I can’t share the post with that friend very easily. Maybe the tools could be enhanced to make this viable?

Second is a matter of privacy. How do you know that new accounts belong to people associated with the geographic location of each instance? If you don’t validate, the system will certainly be abused. If you do validate, then users need to supply some real info! Home address, ID, etc. that’s a big deal for users and instance admins.

Third. What happens if you move? Do you have to abandon your old account and start over? Again, the system itself can be developed further to solve this. But that’ll take time and money.

Next is the operating costs. You would need to build thousands of instances to build this system up. And each one would have to be tied to a geographic region. You need new features to handle signups this way. You have the simple cost of running these servers. You probably need a lot of staff to manage it all. This is an expensive platform for one party to run. Alternatively…

It doesn’t have to be one party running this entire system. That’s the point of the Fediverse, right? The operational costs go way down if anyone can run their own instance. But how do you enforce the rules of federating with instances for geographically nearby locations? I don’t see a reasonable way to solve this one.

I could probably keep listing issues. But these are the big ones IMO. If you solve these, the system is viable and could be amazing.