All this provides me is a clear-cut example regarding why I am not a libertarian and have no faith in the rule of law. This includes the NAP. It is not a crime to broadcast radio waves, even if your neighbors may be exposed to them; if they don't like it, they can negotiate with you, erect a giant lead box around their property, or move to Somalia. Of course, they must do so with the understanding that they, too are impacting your property in a proportionate manner and degree.
Ultimately, as the article briefly alludes to, it is an environmental concern. Not "environmental concern" as in hippie tree-hugger environmentalism, but rather an issue which one must take into account when choosing what environment to homestead or migrate to. If one wishes to avoid hurricanes, one should stay off the gulf coast. If one wishes to avoid radio waves, one should move to a low-altitude rural area and use lead paint on one's house.