This is why I favor 3. It's fairly concise while not being all that obscure. And even if you're not 100% on that syntax, context provides decent intuition about what it does.
I'd say that fixes the problem, but, uh, pretty sure it'll just strangle the platform. Really the only thing I can think of is a few people bouying smaller subs with content. Some of the art Lemmies in the 'imaginaryXYZ' realm are a good example, with like one person posting content on basically all of them. It's enough to make it worth subbing though.
Also I love how a post about how I'm tired of all the politics turned into a political discussion. Like, I do agree with one of the sides, but that's literally what we're complaining about.
I can't wait for Lemmy to get big enough that I can unsub from all the big Lemmies. On Reddit I had a bunch of niche communities that were pretty nice and not political. Now all those spammers I avoided have come here too and the Lemmies aren't big enough to avoid them yet.