see linked post. I believe this would count as one of the examples given in the federation policy https://lemm.ee/post/401063 :

An instance which is knowingly spreading CSAM into the federated network

  • HumanBehaviorByBjork [any, undecided]
    hexbear
    12
    edit-2
    9 months ago

    it varies by jurisdiction, but a server hosted in the US would be obligated to avoid serving illegal content whether it was sent from another server, uploaded by the server owner, or posted by a user of the site, which I believe creates an obligation to defed from CP instances.