Finally figured out how to disable RSS feeds on a post by post basis.
I needed to do this for my stream of consciousness / wip / progress notes in the Notes and Miscellanea section I did not want to disable the whole section, because some posts, I do want to leak out.
This is a companion discussion topic for the original entry at https://janusworx.com/work/notes-now-has-no-rss-feed/