This is a big problem. It creates the illusion that /c/cats on one particular instance is the real /c/cats.
This is the root of re-centralization and it must be pulled out.
1 point
That is essentially what happens and it’s a technical issue, not a philosophical one. If one instance is denied posting to another, the user should be notified at some point about that. There are a lot of silent errors right now with the setup. If you disable signups for example, users can still try but never see that it will never work.