At what point is it useful to blame a manufacturer for making a tool available which can lead to serious bodily harm? This is the fundamental question behind d

At what point is it useful to blame a manufacturer for making a tool available which can lead to serious bodily harm? This is the fundamental question behind drugs and firearms. It all boils down to how stupid, informed, impulsive, and gullible people are at various layers of the sales, distribution, and usage stack. For firearms city dwellers generally believe the buck stops with manufacturers because if they didn't exist then nobody would shoot each other anymore (sic). For drugs many believe the buck stops with doctors because they are the patient's advocate and authority figures perpetually repeat that doctors always know best because they are educated in the matter and the average person isn't. Americans have generally internalized this propaganda.