I was about to enter into the fray, but before posting my opinion on some of the arguements here, I realized something:
This thread is no longer about the 20 dead kids, or 7 dead adults, its about shouting what you've believed about gun control for the past decade, the same stuff you've said in other threads, and maybe after other tragedies.
That's kind of depressing.
But this kind of violence isn't actually representative of all gun violence in the US. Premeditated mass murder in a single event using firearms (Aurora, Newtown, etc..) is for me much more closely linked to a suicide bomber walking onto a packed bus than it is to a man murdering his wife because he was emotionally unstable and didn't know what else to do (or any other of the 11k firearm deaths we had last year).
If we didn't have guns (pragmatically, a laughable scenario), any guns, the odds of this kid being able to pull off Newtown drop dramatically. Yes, 'the biggest school killing in US history was with a bomb', but that's kind of irrelevant in a practical sense. Making bombs is hard. Pulling a trigger isn't. And a lot more people know how to pull a trigger well than know how to make a viable explosive device. Without guns, Newtown probably doesn't happen, and even if the school gets attacks, the mortality rate likely drops to one or two children, with other non-fatal injuries.
Meanwhile 'gun violence' is a whole other beast. ~11,000 people were murdered by firearms last year (roughly 7 out of 10 murders). If you figure that 100 people each year are killed by mass shootings (and if I'm not mistaken, that's a higher number than it warrants), you're talking about less than 1% of all firearm homicides, and about half of one percent of all homicides total.
The issues of these mass shootings go beyond the gun control debate. Saying stricter gun control would decrease he odds of these shootings succeeding is probably true, but you're affecting an entire nation's lifestyle for roughly 100 people (or, to be more honest, kids) a year, when you should be making policy that would benefit the 16,799 people killed later year, or, failing that, the 11,000 people killed by firearms last year.
Newtown shouldn't be at the center of the gun debate. It is a very small volume of the actual deaths people are trying to prevent, and if you're trying to stop mass shootings, it would be better to study all the security measures that could be taken to do so, rather than a knee-jerk response.
Keep in mind, I'm pro-gun control. I just don't think this what this thread has turned into is really relevant to the Newtown shooting anymore, and it kind of bummed me out.
Because the real cost of things like Newtown (apologies to the friends and family members of those murdered, I'm not referring to you here, the cost to you is one I literally cannot imagine, and it can't and shouldn't be marginalized) or Aurora aren't in statistics, they're emotional. It is a spiritual kick to the stomach to most people, and much more to people who are more sympathetic to such things.
And it's like that because Newtown is so obviously evil. It is wrong on a spiritual level, one that is without grey areas or nuance. Even Scarface knew you don't kill kids. It is engrained in our culture, our community, and in our very DNA. Adam Lanza (I've avoided using his name because that's what the sicko would want) turned his back on one of the very tenets of humanity.
And I don't know how you legislate that.
Sorry for the rambling post. Lot of stuff packed in there, and I probably didn't make it overly concise or efficient.