< ( What's this? A user doing something I don't agree with? I think I shall ban them, and silence them forever! )( Ha ha, that's what you think! I have sent my private key to four other servers, so I will not be silenced! ) >< ( Also I'll reveal their private key so anyone can make them post loads of gore porn. )( ....shit ) >
and extremely adept at how Hubzilla and its security works...
I am not sure how Hubzilla handles it now, but there is a way to "Drop" one of your clones in Settings > Manage Channel Locations.
Or do you permanently have a key forever?
Or, you could just reissue the keys, and the bad clone doesn't have a valid key anymore.
Any server. Any product. Any operating system. Any protocol.
Wrong. See revocation or blockchain fork for instance.