"Fringe," you say?
Only if the Founders, including the Second President of the United States, were "fringe."
"The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." - Thomas Jefferson
But there's no real point in worrying about that, as given the long history of the Supreme Court's discussion of the Second Amendment, it's extremely unlikely that your scenario will come to pass.
I'm hoping for the best, but planning for the worst.