@evan @atomicpoet
Google already indexes much of the Fediverse. Below, you'll find a link to Google results for my own Mastodon handle.
It seems to me that public indexing of public data is inevitable and that public indexing of ActivityPub data would be a good thing for many applications. (Assuming that AP is more than Mastodon.) I do think, however, that more effort needs to be put into providing mechanisms for non-public, private communications in the Fediverse.