@dansup @pixelfed A non- or less destructive domain block would be nice, if not available yet.
I think that might have to be just porous enough to let the other server know that a user and follow relationship still exists, but should reject new follows and transmit as little data as possible to the blocked instance.
Edit: Basically something you can enable if another instance is experiencing some massive but likely short-lived problem, ideally with the option to purge only recent related content.