I'm not a fan of this idea. The principle of hubski (and correct me if I'm wrong, here) is that you yourself are supposed to be your own moderator. Handing this responsibility off to somebody else seems contradictory.

I'm also unhappy about how it would marginalize whole groups of people who aren't liked by the more "popular" users. Yes, tradition is a good thing, but stagnation is what kills communities! I can easily envision these list leading to stifling of dissent.

And finally - and this might be unpopular - I live in constant fear of building myself an echo chamber. I don't want to talk to people who share all my views and agree to me and all. I need people I can actually have a debate with. The inevitable fallout of internet debate seems to be stepped-on toes. And I would rather prefer stepping on consecutive people's toes and getting them to filter me or whatever than pissing off one influential person and pretty much having to create a new account. If you mute someone, you better be damn sure they deserve it.

As for your scenario, I would hope hubski's mechanics are robust enough to handle such a situation without having to resort to mass muting.