Where I still struggle is in the details of defederation for a service like kbin because it's more interactive than Mastodon. Here are some examples that confuse me.
For these, let's assume we have Servers A, B, and C. Server A has defederated from (i.e. blocked) Server B, but otherwise they are all connected to each other.
Someone from Server B originates a thread. Someone from Server C sees it and comments on it. I assume people on Server A don't see the post at all, even though there are comments from Server C people.
Someone from Server A originates a thread. I assume people from Server B can see it and comment on it? That is, the blocking is only one-way?
Someone from Server C originates a thread. Someone from Server B comments on it, and someone from Server C replies to that comment. What can people from Server A see?
Anyone who can shed light on this will be greatly appreciated. :-)