Best post of this whole string! I love RAGE!
As has been stated, killers will find a way, and to trying to project or assume some sort of rational thought patterns have influence on a person who is violent and aggressive enough to take innocent lives is beyond silly. Someone who is able to get to that dark and disturbed place emotionally is not thinking in the same reality that the rest of us want to live.
Theoretical arguments aside, the reality we have is hundreds of millions of guns in the hands of both legal and illegal gun owners, and any legislation, regardless of how well drafted, can only affect the number of guns on one side of that equation, which inherently hurts the law abide-rs more than the criminals.
What if we take a look at the value our society places on violence in general. UFC, NFL, video games, and most action movies not only tolerate, but celebrate violence to a degree that should be disturbing but we have all become desensitized to it. We repeatedly declare our approval and desire for more and MORE of it when we give them our consumer dollars.
Want to see something change!? Go look where you spend your money and how much can be tied to our culture of violence and start there.
If you are not willing to change your behaviors then quit whining when one of our paid warriors uses too much of the violence and aggression he is loved and valued for in a context you do not like, because effectively you paid him for it.