here's how to block from the command line (what I had to do)
$ ssb-server publish --type contact --contact "@vYqLJ+S8RSwrgU6Nxja0kM3d19oWqjv9Og2JCbDd8+U=.ed25519" --blocking true
This merging of bubble immediately added about ~250 MB of messages to my log... jumped from sequence ~700k to about 1000k. Kinda unreal, and a really awesome test case.
Nice rendering @Hendrik Peter. I think it's useful with Gephi to only show accounts which have more than say 50-100 messages to their name. It makes the graph more "realistic" to what's active. I also think adding data about how many messages a peer has posted as the size of a node helps grok the impact. I wonder who the accounts around @sbot are.... and I'm really curious what that project is