The answer is "NO"
80% blanks are--legally--just hunks of steel and have nothing whatever to do with the gun industry.
Actually—hunks of aluminum. Not steel. Sorry about that.
Right - got it. So are fender washers. BATF&E and the law? There is no intersection.
Businesses need to make it clear to their customers that some future administration won't be able to get a court order for sales history from one of these companies - because they will have no sales history - because they have a policy of destroying any record that has a name and address on it after the item is sent.
Which means I can't be buying these things on line with a credit card...
Am I being paranoid enough? Time will tell.