Nothing motivates me more to read mailman 3 manual than yet another facebook data privacy boondoggle.
I know mailing lists to keep in touch with everyone is not the best solution, but I find it to be a viable solution.
Also I've been using firefox facebook container,since it's been released.
https://www.cbc.ca/news/technology/facebook-information-data-nyt-privacy-1.4952474?cmp=rss