EDIT: Looks like the defederation has been reversed. @db0 Thank you for looking into this quickly.
A commenter in the linked post is suggesting that dbzer0 automatically follows lemmy.world’s block list. That seems like kind of a bad idea? In this instance it seems like the LW admins are just following the decision of lemmy.ml’s tankie admins, and tankies gonna tank.
IIRC, it’s not exactly defederations being looked at, it’s actually a specific category of censures logged to Fediseer by lemmy.world admins. The category that lemmy.world admins chose for ani.social is one that is banned on dbzer0.
Whichever bot is handling defederations on dbzer0 simply saw a new site in that category on lemmy.world’s Fediseer and auto-defederated it too AFAIK
Hexbear is not in that category so is ignored by the bot