I think your point is interesting if not conclusive, and I think your down-voters missed your final paragraph, but I think you're missing something here:

> The counter-measures necessary - hermetically sealed living space, faraday cage enclosure - are so burdensome that only people who currently live in bunkers will implement them for their living spaces.

There are a lot of situations we forbid activity that is difficult to prevent (and sometimes difficult to detect).

Whether trying to use the law to deter here is worthwhile, meaningless, or harmful isn't necessarily clear - but it deserves consideration in addition to outright prevention.