The interesting part about this problem is that Nostr, as a protocol, is in one of the best positions to offer the most private experience possible.
And these aren’t just buzzwords. With just one click, you could enable a completely anonymous mode.
For some accounts, you could mark them as Tor-only, ensuring they work only when Tor is enabled.
No protocol changes are needed, these issues can be addressed entirely by clients.
Privacy is the best feature any client can offer.