We have a delete spec. It's up to relays if they want to follow the spec, some will out of respect for the publisher, others will not out of respect for the truth and full transparency.

https://delete.nostr.com/ 

 The delete spec is more of a hide spec, so it’s exactly what avi wants! Just everything might not implemented it so it’s more of a “maybe hide in some places” spec. 

 Umm, this should be uniform