The original meaning of “doomsday weapon” was a weapon that you wouldn’t use until doomsday because you’d lose the advantage. The first example was Window, a British anti-radar device in the Second World War that consisted of throwing shredded aluminium foil out an aeroplane. This would blind the enemy anti-aircraft…

I was subjected to this back in the 1970s and it was just as loathsome a bit of bait-and-switch, moral posturing, and social blackmail then as it is now.