And purchasing a knife is the step before stabbing someone. Your argument is ridiculous.
How is it ridiculous? The fact that purchasing a gun is the first step of shooting people is a good enough reason for most countries to ban the purchase of guns...
Yet they don't ban kitchen knives because there's legitimate uses for kitchen knives. Thus the point that you utterly missed.
iirc the UK does ban kitchen knives from being carried publicly.
I don't think "because there's legitimate uses" is the differentiating factor, since that implies only kitchen knives have them. Self-defense is a legitimate use for owning a gun, for example.
In many countries self-defense is NOT a legitimate use for owning a gun.
Many of these countries have exterminated their large predatory animals.
Guns also have legitimate uses.
There is no argument, why are people jumping to extrapolation? I'm pointing out that this DNN can be (and is being) used to identify people based on the ("any") detected faces. The possible usage is certainly related to the Parent comment issue.