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 yes this is how I interpreted it, because the shared secret is the only secret involved during encryption. So when people say “dms will leak your private key!” I assumed they meant shared secret. If shared secret could leak private key that would be pretty bad and ECDH would be insecure. 
 This risk is further reduced if relays start putting DMs behind AUTH too, isn’t it? 
 That is an anti-pattern  
 Ser 
 Exposing sensitive data to fewer people is an anti-pattern? 🤨

The entire concept of broadcasting sensitive 1:1 communication to the whole world would seem to be the antipattern. 
 That's better than I thought. The main vulnerability would then be encryption to self since that's done more frequently. But you could use ephemeral keys as a nonce to generate a bogus shared secret. 
 @DM Leaks Don’t assume because of false assumption rather validate or confirm especially in Age of endless Spam/Scam not only by Fiat paid trolls but also unpaid AI bots for example, there is no such thing a shared secrets including Top Secret where security 3 dimension is about Access rather shared intelligence even in quantum entanglement there is transparency not security like 4 dimension since the piece is part of whole no separation like law of One unlike divorce divided by secrecy cheat means more than one or lack of oneness (unity) by self custody metaphor not your coin not your keys like private key.