5. Problem: authenticating new user sign-ups as being from non-spammers is tedious AND, thanks to generative AI, prone to being gamed.
6. Added problem: it's too easy to set up a new fediverse server. We're used to treating user accounts as spam sources, but what happens when a script kiddie automates spinning up a new containerized mastodon instance on AWS just to federate and then send spam?
7. So federating new servers is also going to require proof-of-humanity steps.
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