If it’s connected to the rest of BlueSky, all of its data to any other servers goes through that of BlueSky’s. Even if user on private server A communicates with a used on private server B, the message is routed so that BlueSky’s main moderation team can always affect it – they can block it or they could technically even add to it if they wanted to.
No other servers on BlueSky have that right. Except servers that are completely detached from all servers connected to that of BlueSky. And their separate network has their own central server, then.
If it’s connected to the rest of BlueSky, all of its data to any other servers goes through that of BlueSky’s. Even if user on private server A communicates with a used on private server B, the message is routed so that BlueSky’s main moderation team can always affect it – they can block it or they could technically even add to it if they wanted to.
No other servers on BlueSky have that right. Except servers that are completely detached from all servers connected to that of BlueSky. And their separate network has their own central server, then.