According to 8.2 of Hetzner’s Terms of Service:

The Customer is obligated not to publish any content that infringes on the rights of third parties or otherwise violates applicable law. This includes in particular, but is not limited to, pornographic or obscene material, extremist content or content that offends common decency, gambling, material that could seriously endanger the morals of children or young people or violate the rights of third parties (copyrights, name rights, trademark rights and data protection rights). This also includes the publication of defamatory content, insults or disparagement of persons or groups of persons.

According to this post, Lemmy.world is using Hetzner has their host.

This means that Lemmy.world is violating the Terms of Service of their service provider. Lemmy.world should comply with Hetzner’s terms to avoid disruption such as suspension.

To do so, Lemmy.world should defederate from all porn instances such as lemmynsfw.com and pornlemmy.com and ban or delete any porn communities.