A few Ventura County cities have recently passed, or are considering passing, ordinances requiring gun owners to report the loss or theft of their firearms, typically within 48 hours of when the owner knew or "should have known" the gun was missing. Gun-control advocacy groups, having learned from professionals how to spin their anti-gun-owner proposals as benign, disingenuously claim the law will prevent unlawful sales of firearms by purchasers who buy a gun legally, intending to resell it illegally on the black market. These "straw" purchasers often falsely claim that a crime gun traced back to them was stolen or lost.
Gun owners typically report stolen firearms anyway. These laws will only further victimize theft victims and impede criminal prosecutions.
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http://www.venturacountystar.com/news/2007/aug/10/why-pass-an-ineffective-law-on-guns/this article made me re-think my position on such laws....i used to be fully supportive of them but now i'm starting to think that it may practically be more harmful. Its like banning drugs- good idea in theory, bad idea in practice.