Some people were complaining that this is entrapment and illegal. Not sure about that but it is playing with fire since getting a lethal weapon isn't exactly difficult. The attack in Nice was an example of how much damage you can do with a car, the attack in Japan showed the kind of death toll that you can do with a knife and getting a firearm in USA is easier than in most countries. (And despite my stance on gun control I want to point out that having actual working firearms be outside of control, like shotguns for example, is stupid. A gun is a gun, it doesn't help that buying a pistol requires a background check if the criminal can easily get a shotgun. Or buy any gun from a civilian without any type of restrictions...)