Exactly. No law would have prevented this.
I don't think anyone's arguing that a law could have prevented this, so I'm not sure what the point of repeating what everyone else thinks serves...
I think the laws are fine the way they are actually, what needs to be different?
Small tweaks, here and there, in my opinion: Cleanup the whole "assault weapons" nonsense which is murky and meaningless and explicitly define the line demarcating what is and is not legal to own based on
rational standards instead of what feels good on a particular day. Harmonize the patchwork of existing laws, or preempt them, so that gun owners who are travelling across states, don't just become felons simply by virtue of driving across a State?
I think that a big issue will, inevitably, be how to handle private-party sales and sales at gunshows.
On the issue of private-party sales, while I am loath to place restrictions on what private individuals can do with their property, I think that in the case of private sales of weapons, a provision that requires that for most transactions (except those between family members) the seller must be vetted against the existing system makes sense. To that end I would simply require that all such private sales be "signed off" by a licensed firearms vendor, who would run the same checks as he would for a weapon that he would sell at no cost (or for the actual cost he has to pay to perform such a background check query). To be clear, the vendor would not take a cut from the sale, nor would he be able to prevent the sale from going through unless the background check indicated that the buyer was legally prohibited from owning weapons. I realize that this has some privacy implications, but I don't think it's unreasonable.
Drastically cutting the number of guns in circulation seems to be working pretty well in Australia
"The National Firearms Agreement -- reached among the political parties less than two weeks after a gunman killed 35 people and injured 23 at a Tasmanian seaside resort -- cut firearm homicide by 59% over the next two decades and firearms suicide by 74%, the report showed.
The law banned semiautomatic and automatic rifles and shotguns and put in place a mandatory buy-back program for newly banned weapons.
The buyback led to the destruction of 650,000 guns, the Sunshine Coast Daily reported"
http://www.usatoday.com/story/news/nation/2012/12/17/australia-gun-reform-buyback-us-national-firearm-agreement/1774549/
Such a program would only reach a very limited audience in the United States and would take very few weapons off the streets. Those who have weapons illegally would be disinclined to turn their "pieces" in for a small wad of cash. The weapons that would be turned in would be either very old, non-functional weapons, or weapons owned by law-abiding citizens who wish to get rid of them and who could have, just as easily, sold their weapons to a local gun store.