What is lemmy.world doing defederating before hexbear even federates? lemmy.world/instances

This is what it took to defederate from exploding-heads after being federated with them since the start of lemmy.world

https://lemmy.world/post/747912?scrollToComments=true

What evidence do you have of hexbear breaking the lemmy or citizen code of conduct?

Has the criteria for defederation changed?

Hexbear is one of the largest and most active lemmy instances:

Compared to lemmy.ml:

Compared to lemm.ee:

and lemmy.world: