I feel this is the fatal flaw of the lemmyverse. Before I heard about lemmy I was building my own similar system where you would subscribe to servers/instances specifically, without any cross instance caching. That way you will only see what you want to see, and if an instance gets overloaded they have to scale up, but won’t bring down your whole browsing in the meantime. It would be up to the client apps to aggregate all your instances/feeds to show you a list to doomscroll through, but you would have one account (activity pub compatible) to subscribe to them all with. If there were private, invite only communities for piracy then it wouldn’t legally jeopardize the rest of them either. I keep chipping away at it. One day I’ll publish is.