Ctrl-R on Nostr: This can only be done if a post is public, or unlisted, correct? Only those who could ...

This can only be done if a post is public, or unlisted, correct? Only those who could see the post anyway would see a fetched post. So, if you want to "withdraw" a quoted post you would just have to have the ability to make it visible to followers only, or make it private. If a post is public anyone can fetch it anyway.