Privacy tip for nostr:
If you want your notes to reach many relays, but you don't want to reveal your IP address to all of them, then connect to a proxy relay instead.
This way only the proxy will learn your IP address, but your note still reaches all known relays with only a minor latency.
Blastr is a free and open rust code to run such a relay as a cloudflare worker by Deleted Account (npub1t0n…jgqv) & benthecarman (npub1u8l…turz). https://github.com/MutinyWallet/blastr
To configure it, simply add the nostr.mutinywallet.com relay to your nostr client, and configure it to only upload, not download notes. Then disable upload for all other relays.
Write a new note, and see in a third party client if that note shows up. If yes, you can rest assured that many may read your notes, but only a few learn your IP address.
If you use a VPN or Tor ontop, then even the mutiny wallet and cloudflare server do not learn your IP.