It's possible to create a private relay for your friends only and enjoy free of ads and spam conversations.
Discussion
You can whitelist npubs for write access, but can you also whitelist for read access?
Sure. Relaying things only to whitelisted npubs and ignoring all the rest.
Also your relay is free of unwanted data, only for your homies.
You could even host your personal relay on your home network just for personal notes and other stuff 😁
Reminds me of this idea I had:
https://primal.net/e/note18klmq4u3tguytz36cv0ks2lcrwzgpcffmtmtp7qmhyat0kka06fqfeah39
Wait maybe you can quote a post with just the note ID?
note18klmq4u3tguytz36cv0ks2lcrwzgpcffmtmtp7qmhyat0kka06fqfeah39