That said, I do not want my social network to be a public commons (and from what they’re describing, it doesn’t sound like Bluesky actually does either). Online, I want to be able to block and deplatform e.g. Nazis and MAGA trolls pre-emptively and with extreme prejudice because I want to enjoy my time on social networking sites, not raise my blood pressure.

I don't even want meatspace public spaces to foster an atmosphere that's conducive to hate. The government might not be able to stop a Nazi rally, but I want the community at large to make sure people never feel safe doing so, and for people to understand that publicly proclaiming your hatred and bile will make you a pariah.