Yep, I'm aware of that. (Only because I've bumped into posts about that accidentally; my reverse-reading of Meta hasn't got me there yet.)

I've always kind of liked the idea of giving users the tools they need to reliably keep shitposters from getting a foothold, and if this were my forum, I would totally experiment with all kinds of different schemes, but, in the end, I think most people (even the top users merit-wise) probably can't be trusted with such tools...

The thing is, if the trust system is anything to go by, then (by far) most users don't have the ability to be objective when it comes to rating each other. So, I expect any system that gives people the power to suppress other users will end up being used unfairly and for things way beyond their intended purpose.

That's why my current thinking revolves around pull mechanics rather than push mechanics. I'd like to give users the ability to basically nuke anything they don't like, but those decisions should only affect their own view of the forum, and the only mechanism for those decisions to spread and have a wider effect should be by allowing other users to voluntarily subscribe to some subset of another user's curation-related judgment calls.