[Shalom Israel]

Sam, the theater doesn't own the spectrum it purports to use - its someone else's (the spectrum licensees) property.

Um, you realize that passive shielding is in fact legal? By the above ridiculous argument, it should not be.

[RFEngineer]

"Um, you realize that passive shielding is in fact legal? By the above ridiculous argument, it should not be."

Spectrum licenses apply to transmitters only. It kinda makes sense if you think about it.