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The whole point is ease of key exchange. Of course if you don't want any hint of your email details out in the world you shouldn't use it.

Ease of key exchange does not justify publishing what is effectively a public ledger of who I start communicating with when.

I think you're misunderstanding the gossip protocol, but, regardless, that was not the claim I was responding to, it was that the disclosure of email addresses (or a hash of them) with no way to remove them from the Key Directory is somehow beyond the pale for a public (and automated) key exchange system.

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