Don't ask me how it could be done or even if it would work, but it seems the knife industry would benefit from some sort of oversight committee, at the very least for companies claiming to be completely made in the US. Again, I'm not sure if that's even a realistic solution, but it doesn't seem right putting all the responsibility on the consumer.
It's not realistic for the knife industry as a separate entity.
As an example...back in the 90's while I was still working as a special agent in Miami, I got wind of a large seizure of knives which had been imported from Asia. Can't recall if they came in by air or sea.
There was a knife show going on in Miami which I attended, and some of the exhibitors / vendors who knew me and what I did, cornered me to ask what was up.
They were under the impression that Customs had seized the knives for being illegal for one thing or another...that had to with size, legality of carry etc. which got them up in arms. I had to explain to them that the issue was that the containers were full of goods which had not been labeled in compliance with the law and as a result were seized and not permitted into commerce in the United States. I think there may have been some auto knives which were also outlawed from importation.
Anyway, they were relieved it was simply that the lower end knives they were importing weren't illegal for what they were, but for failure to meet proper labeling and paperwork to be admitted into the U.S. as regards country of origin. I can't speak to whether any of them tried to pass them off as something other than foreign made to the unsuspecting, as these weren't the kinds of knives most collectors like us would be interested in.
But, the fact is that the matter was considered small potatoes by the standards for fraud and commercial violations, so most of the product was, as I recall, simply destroyed since it was the least expensive outcome. No criminal indictments came from any of it.
Long way of saying, that as much as it matters to us...absent a large case involving massive fraud in the millions of dollars, it's unlikely that it's going to move the needle for most investigative agencies. Just the way it is.