["Followup-To:" header set to sci.electronics.design.]
Spob wrote:

Would it be possible to build a gizmo that could be surreptitiously
aimed at the offending stereo system to fry some crucial components?

At some hacker congress I once saw a proposed device consisting of a
satellite dish and the guts of a microwave oven.

I dreamed about it while lying awake at night when I lived in an apartment
with nothing but a wooden ceiling between a jukebox and my apartment.

robert