[zzo38computer]

I don't like that kind of mentality much either, but is there a way they can suppress only some of the messages on their instance, while other ones are still federated on their instance? Maybe there would be a way to allow such a thing to work, that admininstration of some instance can program it to copy only the message they want to copy, or to let you to program your instance to only send some messages to their instance, so that some links including only some messages, and other links between instances will have all messages because they allow you to copy all of them.

(I think that the client-based filtering, although with default settings provided by the server (which the user can choose to use, customize, or ignore), might be better, but server-based could be used if needed, e.g. to avoid flooding the bandwidth. If you are using NNTP, then you can filter by From header, References header, Injection-Info header, Newsgroups header, etc. The server probably could still ban users who misuse those headers for ban evasion, I suppose, but if those headers are not misused, and the connection does not waste too much memory/disk space/bandwidth, then a hard ban is not needed and the filtering can be used instead.)