Yeah, this reminded me of the dutch broadcastings association 1969's april fools joke. In which they said to have developed a device that detects "zwartkijkers" (blackwatchers), for use by mailmen [1].

Funny detail, the reporter asked "Can this devise detect all televisions?" to which the fake interviewee answered, "well if you wrap your set in aluminum foil no, but otherwise yes". The next day aluminum foil was sold out nation-wide.

[1] https://www.facebook.com/AndereTijden/videos/1-aprilgrap-jou...