IMO, I'm sure if some guy in NV has an illegally converted AR or something he wouldn't just blab it. (And if he does it's his own stupid fault). All of my guns are legally purchased, registered, safely stored, trigger-locked, etc.
The government already knows what kind of guns I own. The only persons who would have malicious intent, other than the gov't, would be crooks. They'd have a lot harder time finding out who I am, where I live, etc.