@brion @cscott so, it's a fair set of questions.
Your questions are thoughtful and empathetic.
We already have RSS and Atom feeds for user contributions, available for public review.
I was anticipating generating the same content in ActivityStreams 2.0 format, and then adding ActivityPub subscription.
Would it be unreasonable to build it as such, and let communities decide (TM) whether to enable it?
https://en.wikipedia.org/wiki/Wikipedia%3ASyndication?wprov=sfla1