I love how you freely block arseholes on sight, but I thought that the whole AUTHORIZED_FETCH config setting was to prevent servers you've blocked from ever seeing your posts, whether directly or indirectly? That's a real bummer if it doesn't work that way (but I'm making the assumption that you've turned it on).
(Obviously this doesn't help with folk taking screenshots and DMing or emailing you, but I thought Mastodon at least had the above feature.)