First of all Jzdziarski is not only right, but he's just scratching the surface.
Assuming the remaining dust from the already masterfully eroded Second Amendment gets completely blown away (one of those Constitutionsl protections that obligates the Government to preserve, protect and defend - FOR us) there ARE still a few hurdles.
One of them is a law.
Right now there is no law providing for blanket superceding of the the Second Amendment. They're getting there (the "Laughtenburg Amendment being the most flagrant example that comes to mind). Barring ex-felons from firearms possession opened the door. It took a while, but now selected misedmeanors (spousal battery) blew the door off the hinges.
There's no nexus in the "ex-felon prohibition to cause the Government to demonstrate that any Felony had anything to do with any kind of violence. And on topic of legislative absurdity, there is actually a section (I can't recall the cite off hand) of Title 18 United States Code, that makes it a felony to counterfiet the image of "Woodsie Owl" - no shit.
So if felonious counterfieting the image of Woodsie Owl is as cause supporting to revoke Constitutional Rights as felonious drug trafficking/racketeering, etc., how big is the leap to make misdemeanor speeding (it is in some states) just as cause supportng as misdemeanor spousal battery (like say, dumping a bowl of cold pasta at your errant teenager who is pitching a temper tantrum at the kitchen table)?
I wish I was making that up. But it's a matter of record (not mine).
But when they do take enough steps to legislate further infringement of the Second Amendment, to permit the Government to outlaw possession of whatever firearms we have left, there's still the Forth and Fifth Amendments (and don't ever think those are absolute, nor universally interpreted and applied either).
Of course, obviously, seizing your firearms is going to first require finding them. It's true there is a paper, as well as electronic, trail a mile long demonstrating that someone that might have been you bought gun.
But the Probable Cause Test (not-withstanding the fact that it is applied inconsistently as hell) for a search warrant requires a demonstration by the Government (supported by an affidavit executed under oath by an LEO) to a judge that:
1. Probable Cause exists to believe that a crime has been committed.
and
2. Probable cause exists to believe that evidence of that crime (which has to be specifically described) exists at the location for which application for the Search Warrant is being submitted.
Merely proving that your credit card was once used to buy a gun doesn't prove that you were the one who used it. Logging onto a website doesn't prove who was using the computer when the event occurred. And your owning, and/or living in a house doesn't prove anything relating to what is in that house.
Demonstrating those kinds of things ALONE (being a key word) won't come close to passing any of those tests.
Even combined with ALL of the the dealer's records, federal firearms forms, instant background checks (I know they're not supposed to keep them. But techonologically I guarantee they're recoverble), could prove that you probably bought a gun - once.
All of those things alone, or even combined, don't go far enough to demonstrate that you probably (as in Probable Cause):
1. Still have it.
and/or
2. It's in your house.
Your own big mouth will though. It's human nature, don't be offended - be enlightened.
Your neighbor's will help. But that's a "Pandora's Box too (i.e., your dog took a shit in his yard and it's pay back time). His credibility needs to be foundationalize for purposes of using him as a source.
You also have a Fifth Amendment - your Right to Remain Silent? It's true that for your Fifth Amendment Right to apply, two circumstances must exist, which are:
1. Custody. And that test is not whether you are charged with a crime and formally placed under arrest, it's simply whether your freeom to leave is, or would have been, prohiibited.
and
2. Interview (Interrogation/Solicitation of dialogue, etc).
So when those "Jack Booted Thugs" show up at your door and dump their opening line on you, it would be advantageous to listen politely (but you don't have to), then tell them you don't care to talk to them.
Unless they've got a subpoena. In which case, you would accept the supboena, of course, represent that you will provide it to your attorney. That would be a Grand Jury Subpoena, and ATF/FBI Agents aren't a Grand Jury.
What they're usually not going to tell you, is that you have every right not to talk to them, but you do. They're not going to tell you that you have the right to leave (or close the door) either, but you do. And if they do advise you of the foregoing, be extremely judicious because they are very well trained, disciplined and skilled investigators. And they're telling you that because you:
1. Are a target of the investigation
and
2. They are wisely cleaning up arguments agains defenses to supress anything you tell them.
So shut up.
You ALWAYS have a right to remain silent and you ALWAYS have a right to an attorney, whether you're under arrest or not. Remember that and always and exercise both of those, as is appropriate.
Don't engage casually ("Oh!" "What a nice dog." "What's her name?") or confrontationally ("Show me a warrant or get the fuck out of here").
Watch your mouth, be polite and don't answer any questions with anything but other questions. And perhaps clarifications (like the classic "it depends on what the meaning of the word "is," is")
Excepting, of course, those relating to your identity and what you are doing there (i.e., "Yes, I'm Joe Blow." "Yes this is my house." And, "Yes I live here." As opposed to "It's none of your business." "It's not my house." And, "I'm just a burglarizing the neighborhood.").
Now, what we all need to do is realize that Civil Rights didn't happen because the Government suddently, and spontaneously, decided to enforce OUR Constitution. Unfortunately, the cost of freedom is not a price paid once, but rather a recurring charge billed in endless installments.
Here's to liberty and justice for all.