These communities are not even hosted on lemmy.world, this is an absurdly overreacted response. There were no signs of any legal trouble and I can’t understand how lemmy.world specifically would be the target of such legal action. If you want to host an instance, you should do everything in your power to allow discussions on any topic, while in necessary cases disallowing direct posting/linking of illegal content. Instead, you chose to block a community that has long been known to avoid having any trouble with the moderators.