I think explicit & transitive trust is a strategy worth exploring. If you trust accounts made by people that you know personally, and you transitively trust the people that they trust (say... five hops). That's going to be a significant portion of humanity.
If you start getting a little spam, you explicitly revoke trust in the spammers. If you get a lot of spam, revoke trust in whoever you trusted that trusted the spammers, etc. A little bit of social graph hygiene ought to go a long way against spam, so long as we're trusting people and not platforms. We're practiced at one of those and not the other.
If you start getting a little spam, you explicitly revoke trust in the spammers. If you get a lot of spam, revoke trust in whoever you trusted that trusted the spammers, etc. A little bit of social graph hygiene ought to go a long way against spam, so long as we're trusting people and not platforms. We're practiced at one of those and not the other.