People love their firearms and anything done could be seen at an attack on the second amendment. So why not change the tools themselves? As I'm sure some of you are aware Near Field Communication allows people to make all type of transactions without having the physically swipe a card or write a check. Well why not apply that type of technology to weapons?
This was recently demostrated in Metal Gear Solid 4, weapons were tied to an unique ID and could only be fired by that person with the proper clearance. They used nanomachines in the action game, but in real life this technology could be applied to any device you would like (a card, a patch you could wear on your clothes, etc) and the weapon wouldn't fire without those unique ID's matching and thus unlocking the weapon for use.
What are your thoughts on this? I know there would be some initial cost issues and this would be for future weapons as it would be really hard to retroactively gather weapons and ID tag them. Also the legislation could be on the business side of things to not burden the consumer with this process. I believe this could in effect make firearm theft and accidental child deaths through curiosity a non-issue!