I have little interest in being a mod, but I see the issues you’re describing as a user and I’ve given them some thought.

You can create a community with a similar name or switch instances if you cant get your instance admin to help. For me, the frustration isn’t so much with unmoderated communities but abandoned ones, especially on larger instances.

Fixing that seems simpler, as adding a toggle to hide inactive communities should hopefully not be controversial and it could be implemented by the client. Please?

It will be interesting to see how things evolve, as a solution is clearly needed but federation poses some interesting challenges especially since deleting posts should be discouraged.

If that account only ever logged in there, maybe? I’d think they’d be smart enough to look at the most commonly used IP address by the account(s) in question. Then again, it is reddit.