It should also be remembered that Nostr is NOT intended to be private. Nostr is the ultimate public square, and that has always been its greatest strength and its greatest weakness.
Private communities is something that is being worked on, though. nostr:nprofile1qy2hwumn8ghj7ct4w35zumn0wd68yvfwvdhk6qghwaehxw309anxjmr5v4ezumn0wd68ytnhd9hx2qpqzuuajd7u3sx8xu92yav9jwxpr839cs0kc3q6t56vd5u9q033xmhsxjhppf is going some great work in that regard. I am also intrigued by nostr:nprofile1qyghwumn8ghj7vf5xqhxvdm69e5k7tcpz4mhxue69uhkzet8d9ejuat50phjummwv5hsqgpm7rrrljungc6q0tuh5hj7ue863q73qlheu4vywtzwhx42a7j9n5zgwjy3 's lockbox and how that might be combined with nostr:nprofile1qyvhwumn8ghj76rzwghxxmmjv93kcefwwdhkx6tpdshsz8nhwden5te0dp38ytnrdaexzcmvv5h8xmmrd9skctmfde3x77qqyztuwzjyxe4x2dwpgken87tna2rdlhpd02va5cvvgrrywpddnr3jy4ywtuu 's #Flotilla app, with relay-based communities.
But kind 1 notes posted in Primal, Amethyst, Damus, or any other "twitter-clone" type of client should always be considered public.