@gargron ...But this isn't listed there, and using "summary" is "content warning" is iffy at best, imo, considering the Atom spec. 

Regarding privacy, I believe there have been many many long discussions on how that can be handled in a federation, and the answer seems to be, unfortunately, "it can't", but if you've got something new that can deal with malicious followers and all other sorts of interesting issues in a _federated_ and _interoperable_ way, then I'd be very interested. It's a very very tough problem that I've spent some time thinking about with no real progress, so I'd be very interested in seeing your thoughts.