Whether on purpose or accidental lemmy.world admins are a bit secretive about which communities they block, there is no published list anywhere I could find.

It may be illegal to link to illegal content. They could certainly get in trouble over it.

Lemmy.world tries really hard to follow the law. That means cracking down on illegal content. So yes, we are puritanical here.

At the very bottom is a menu with an entry called “Instances”. Click that to see lists of linked and blocked instances.