Is anyone out there really buying bulletproof vests right now? This sounds like more disinformation to me.
When I was taking a class by Masaad Ayoob, he pointed out that having a gun, and getting trained in its use, implies that we think there's a significant chance of needing it someday. This would imply the possibility that the other guy has a gun too. Thus it logically follows that maybe having a vest among the gear in your gun cabinet might be a good idea