it seems to me that we're ALL registered, our birth certificates, irs forms, cars, mailing address, magazine subscriptions, email.. all of that is up for grabs, what the feds aren't SUPPOSED to do is actually conglomerate all of that info and your gun buying together into a go get guns and gun-owners thumbdrive/list and give it out to your local national guard
beyond a pogrom on gun-owning conservatives or invasions of privacy at random they already have the data floating around somewhere
think about the military though, they have rosters with all the info they can possibly have about any service member, you'll be lucky if your battalion has the right bloodtype and social security number in your paperwork before they deploy you. I don't doubt the info is out there but coordinating it is unlikely to be successful if it was legalized, let alone successful on a covert level. don't do anything online other than gripe and you'll be alright... the liberals can't get you for that (that's all they do to, they understand)