Allow each reader to have his own moderation. Basically, I want to be able to enforce 3 rules: 1. There are people I want to read always. 2. There are people I want to read never. 3. I want some random sample from all other people, in proportion from 1:1 to 1:1000, depending on my current mood.

The server should keep my list and serve me text according to it. Also it should allow readers to exchange such lists. If I trust some guy - he could serve as my personal moderator, but a mild one compared to the current regime - my list #1 will never be interfered with. Cheap?