The difference is that most people have kitchen knives, and use them for cooking, not assault. Identifying buyers with ill intent in a retail setting would be i

The difference is that most people have kitchen knives, and use them for cooking, not assault. Identifying buyers with ill intent in a retail setting would be impossible, and I suspect most kitchen knives used in crimes were purchased for cooking. Selling deep packet inspection technology to the government of Syria is different as there is ample reason to believe that government would use it for human rights abuse.