Banning the domain actually doesn't work because people see that the domain is banned, observe that there's nothing wrong with the domain, and then accuse us of being unfair and hostile to the author/site. In doing that they usually jump to the most uncharitable, horrible reasons they can imagine for why we might have done so.
It doesn't work to say "but they asked us to ban their site" because there's no reliable way to get that message to people.
It doesn't work to say "but they asked us to ban their site" because there's no reliable way to get that message to people.