That would be my guess: fear of radio waves and general tinfoil-hattery. Although, ironically, this is likely more like trying to silence the neighbour's obnoxi

That would be my guess: fear of radio waves and general tinfoil-hattery. Although, ironically, this is likely more like trying to silence the neighbour's obnoxious music by running a big white noise generator at top volume. Except that since we can't hear radio, the observed effects look like silence - but it's not radio silence, rather the opposite. If you don't want radio waves, don't run a radio noise generator.