This where we kind of disagree.  I wouldn't go as far as calling guns a hazardous product.  I would instead say that a gun shop that doesn't adequately secure its merchandise should expect this type of thing to happen.  We force homeowners who have a pool to have a fence that is a certain height to keep kids out as pools draw kids like magnets.  Gun shops do the same for criminals.  The end result may be the same in the semantics of our disagreement, but I find that the all guns all the time folks will argue the "hazardous product" bit while ignoring the rest of what you have to say.