This is closer to a shower thought, given I don’t really know much about how ActivityPub works. Has anyone, or is it even possible to, made an instance designed to work as say a FUSE file system?
I was mostly just thinking about how hard UIs are to make and thought “what if the content was the UI”.
Everything is possible, look at this video called Harder Drive for examples of this sort of thing being done.
There used to be (and probably still are) entire youtube channels of apparent static or random shapes that turned out to be massive amounts of data stored as video.