Call Me Ahab has a post about Wal-Mart and Bloomberg

Essentially Wal-Mart has volunteered to step into an enforcement role. They will gather, warehouse, and furnish information to to the police about firearms purchases, as well as red flagging any purchaser and calling the police on what amounts to a request from law enforcement. This is an awful lot of discretionary power in the hands of the middle managers of a retail store.

How does Wal-Mart know if a gun has been used in a crime? Why I am guessing the police will tell them. Is the bar so high that the gun has to be used in the commission of a crime or is it simply the firearm is present when the arrest was made? Perhaps Amazon should build it's own "no-fly list" and report suspicious purchasing patterns to the FBI. Maybe subversive movie watching should be reported to the government by Netflix. Need I mention that none of this stuff is mandated by law, it is all simply store-policy.

Imagine that some fumble fingered clerk enters the wrong serial number, and now the serial number for your firearm puts you on the blacklist. On your next purchase the police are going to be called to question and/or arrest you. My prediction on this is a huge rate of false positives, zero crimes solved because of these new policies, and no impact on crime.