Very interesting indeed! Also just read a couple of pages yet but from the overview it seems the reversible part is the biggest blocker at this point for ssb.

I had the idea a while back to establish some sort of self-block or type:tombstone post to signal wanted removal. It assumes well behaving peers, of course. I'm just not sure how to establish not to re-sync that feed once it is gone maybe some sort of block-list or acknowledgment from other feeds.. have to do more thinking and would love to hear other thoughts.