Should the families of those hit and killed by drunk drivers be able to sue the alcohol companies? Yes or no.
Given the Alcohol companies take reasonable precautions to keep people from driving drunk, no.
The gun industry goes out of its way to get guns to people like Nancy Lanza and Joker Holmes. This is a deliberate marketing decision. The more crime you have, the more people like ray and 2aguy who piss themselves over the thought of the scary negro breaking into their house want more guns, too.
You see, you have to ask yourself who gave Nancy the idea that she really needed an AR-15, a weapon designed to fight the Vietcong in the jungles of Vietnam. What could have possibly possessed her of the notion she needed that kind of firepower.
She wasn't buying it to defend herself from preschoolers.