Here's what it could do...

Example...

I buy a new handgun....few years down the line I sell it...it's sold again and again and finally ends up in the hands of some crazed crack head.

The said gun is used in a crime...it can only be traced to it's original purchaser.

If the gun had gone through a licensed gun dealer each time it was sold it could be better traced should it be used in a crime.

Only way that it would ever work would be to make it a felony to sell a fire arm without going through a back ground check at a licensed gun dealers shop.

That would stop all da baby mommas buying guns....

Ps...I think you guys are just too paranoid