Alternatively: post all your messages publicly and just don't associate your profile with your personal identity.
(Is this a reasonable alternative?)
Take care of your privacy on Nostr Dms only with nostr:nprofile1qqs9ajjs5p904ml92evlkayppdpx2n3zdrq6ejnw2wqphxrzmd62swspz4mhxue69uhk2er9dchxummnw3ezumrpdejqzrthwden5te0dehhxtnvdakqn96kcz; otherwise, anyone can see who you are taking on Dms.
Only 0xchat and nostr:nprofile1qqs24yz8xftq8kkdf7q5yzf4v7tn2ek78v0zp2y427mj3sa7f34ggjcppemhxue69uhkummn9ekx7mp0qyg8wumn8ghj7mn0wd68ytnddakj7fjgzxw have these options that I'm aware of if any other client have feel free to add on comments.