Red herring... Yes, NFA is unconstitutional, yes it's illegally enforced. But watered down masses don't understand this, so you go ahead and test that out with our current legal system and see if it gets all the way up to the SCOTUS. I see what you're trying to do here, but in a broad sense, if an all out gun ban (not something disguised as "common sense" "regulation") did happen, that's where the common person would most likely draw the line.