@c Just to clarify on the titleless posts, in the silos, the post is prefaced with something to the effect of "*name posted" or went to an event or whatever, followed by the post itself. The contextual information is wrapped in a heading, possibly with a screen reader text class to hide it from everyone else, although I haven't dug into the markup in a long time. On the indieweb, I think we could do something slightly similar, up to and including the screen reader text class so that, for non-screen reader users, the titleless nature of the post remains.