Recently I have been working on ssb-friend-pub github git-ssb. The motivation was @kawaiipunks Criticisms of Scuttlebutt thread. This is a plugin for sbot that allows an owner of a pub to assert ownership and providing methods to see which pubs are run by your friends or friend of friends. Hooking it up to patchbay it looks like this:
Even with the default connect to "all pubs", patchbay will still prefer pubs run by your friends. If people start running this messages should start going through quicker as you are likely to be connected to the same pubs.
Another feature is that you can set it to only connect to your own pub, thus providing you with ip safety even without running tor.
You can help test this by running the ssb-friend-pub branch in patchbay.
Implementation discussion