What’s on my mind is: I just find all of this frustrating. I understand the point about the SMTP analogy being superficial since it is dominated by large mail providers and blocklists. But that objection to the analogy seems ultimately superficial because overall this is an argument justifying the primacy of the blocklists. I think people are looking at this exactly how they look at mailservers–which server do I join so that I am not blacklisted to /dev/null by faceless server admins? So in fact the SMTP analogy seems super apt after adding blocklists to it.