I like the way Max Hillabrand used WoT with PGP.  

https://web.archive.org/web/20201127093818/http://towardsliberty.com/contact/PGP_policy.txt

It would be great to know you are talking to the real Lyn Alden, but like Hodlbod sad, this comes with privacy tradeoffs. 

I'm not so sure what that would do for discoverability though, but it's a fascinating topic.