...so help me out. This example uses the word registration to mean purchased through a FFL dealer. I have 2 examples:

1.) Peter legally owns a handgun, a shotgun, and a rifle. Only the shotgun was registered through a FFL, the other two were purchased private party. One day in the future after all firears are made illegal jack-booted Feds (JBF) come to Peter's house because his name and address were on the FFL registry and indicate that he owns a shotgun. Of course while they are there they tell him that he will need to turn in all of his firearm, not just the ones they know about. It is his choice if he does or does not lie to the JBF about continuing to own any of his firearms. JBF may legally or illegally search his house for the firearms. The may or may not find them and they may or may not charge him.

2.) Peter legally owns a handgun, a shotgun, and a rifle. All 3 firearms were registered through a FFL. One day in the future after all firears are made illegal jack-booted Feds (JBF) come to Peter's house because his name and address were on the FFL registry and indicate that he owns a handgun, a rifle, and a shotgun. Of course while they are there they tell him that he will need to turn in all of his firearms, not just the ones they know about. It is his choice if he does or does not lie to the JBF about continuing to own any of his firearms. JBF may legally or illegally search his house for the firearms. The may or may not find them and they may or may not charge him.

I can understand an arguement about not having any of your firearms "registered" but if you have even 1 firearm registered, that is all it will take to get a visit come confiscation day or turn-in-your-firearms day (assuming it will come). If you lie to the JBF on confiscation day and they find you in possession of your firearm later you will still be charged with a crime so... Why are most people paranoid about purchasing guns from a FFL? What am I missing?