I'm against client-blocking of particular users. (The Primal cache is server-side, but it's so integrated with the client that it isn't a true backend.)
Users should collaborate over reports, and relays should be the controllers for the data models, responding to feedback from the users. Clients should just facilitate relay adjustment, reporting, collaborating over reports (like Amethyst does, etc.)
Users and relays moderate the most fairly and transparently, so they should be managing their datasets. That preserves the architecture that allows people to switch clients and see their custom dataset. And then you don't have to act like a dweeb and beg Primal to mute or not-mute.
