Given that all guns, and a large number of non-gun objects (such as vehicles or big rocks) can be effectively utilized to kill nontrivial numbers of people in a soft target situation: is it possible that a more effective intervention may be found somewhere in the fact that several dozen young American men/boys feel compelled to murder as many strangers as possible before commiting suicide each year?

This also seems to me, at the very least, to be a less intractable/objectionable avenue. Less media coverage would probably do more to ease this problem than the banning of some subset of firearm.