One of the problems with gun advocates is that they rely on intuitively plausible arguments while shunning empiricism (so it's a smart move to prevent the CDC from investigating).
Take suicide for instance. When I discuss firearms with students, someone often brings up suicide prevention on the control side, so I'll ask them collectively, "Would gun restrictions really reduce the suicide rate?" You can almost see memes (in the Dawkins sense, not lolcats) ripple through the group as a tentative consensus emerges: No, people will just kill themselves in other ways. "Blaming" guns for suicide is like blaming spoons for obesity, or pencils for spelling errors.
Except here's the thing: Suicide is a surprisingly impulsive act. Women attempt it more frequently, but men pull it off more often, probably because the latter is less squeamish when it comes to gruesome methods. With guns the act can be done privately and without much thought -- you literally pull a trigger.
If you want to jump off a building, then you need to venture out into public. Ugh, that sounds like work. "I hafta get dressed... I'll do it after it stops raining." People are lazy. You might also appear distraught, so someone could ask if everything is all right, and then you lose your nerve and chicken out.
The best example that drives the point home came from a student in the back of a lecture hall last year. As it happens, he was a former libertarian. He pointed out that suicide-by-pill can be reduced with a change in packaging. The suicide rate declines when you take pills out of a bottle (which are easy to dump) and put them in a blister-pack. You pop out six or seven of those ****ers and probably figure "that's enough."
One side of the gun debate routinely refuses to allow human nature to inform their arguments. "Gun regulations won't work because if someone REALLY wanted to kill you they would just do... X, Y, Z." Except that's not how people behave in the real world. Criminals (especially) tend to be stupid, and people in general follow the path of least resistance. Also, technology alters behavior. Most obviously, a lot of people say things on the Internet that they would never say face-to-face. Remove the guns, how does this 120lb kid murder 17 people? He builds a bomb? He can barely work a microwave.
And would anyone be shocked if people using smaller spoons ate slightly less?