That is probably because I've done a poor job communicating it, since I'm still finding time to write about it. Thank you for bringing this up!
Probably most relevant: I kinda sorta had a demo of a P2P LinkedIn working https://www.youtube.com/watch?v=ZiELAFqNSLQ .
So we do have an unstable API that automates key management and key sharing, but all production apps (notabug.io , etc.) today directly use our https://gun.eco/docs/SEA shim over WebCrypto.
Unfortunately, that means you have to be aware of how to apply it - thankfully, we did make a cartoon cryptography crash course on this (in link), so it is viable to get started.
Obviously, if you have any new insights, would love to hear it!
Without SEA, gun is very much like what you say. With SEA, you can protect against just anyone randomly writing to GUN. Jump in and ask more Qs on https://gitter.im/amark/gun about it, or you'll circle back around later - hopefully that is helpful directions?
Thanks. Most important statement of mine: I bet you'll enjoy the cartoon cryptography series.