Anons, had a thunk…
"Think mirror" "has multiple meanings"…
If the Russians spied on the U.S. Embassy using a simple di-pole (PB) antenna known as "The Thing (listening device)" is would conclude that mirrors could act as a fantastic listening device being ubiquitous throughout daily life…
That would definitely contribute to the "we have everything" concept.
A dipole in it's simplest form just needs to be excited by the right frequency while listening on the same. If I had the tools of the trade I'd experiment but, I don't.
Sauce: https://en.wikipedia.org/wiki/The_Thing_%28listening_device%29