This bothers me, although we should be careful not to overstate the legal implications. As for the idea itself, I don't really get it. I mean, are we going to say that a company that makes rat poison can only go so far when it talks about how deadly it is? In the case of firearms specifically, what exactly is the line for advertising? Are we going to blame a car manufacturer that runs an ad about how its car is really fast if some teenager wrecks because they were speeding? Wouldn't that be the kind of advertising that "resonated with disturbed young men who could be induced" to drive irresponsibly? But more generally, I think it's wrong to try to blame the companies for what Adam Lanza did. To me it's scapegoating, and it trivializes his decisions and the failure of those around him to do anything. Blaming the companies lets us feel like we're doing something without looking much deeper at our society than we're apparently willing to.