Ugh, we’re going to interpret the second amendment to cover fireworks, aren’t we? States will be overruled, the New Hampshire border town economy as well as the hands of many drunken Massholes are in for some damage.
This is pretty much exactly how it works already though, go look on google maps at the MA/NH/VM border. As for 2A, well the Supreme Court seems unwilling to apply it to firearms right now so I wouldn't expect it to be generalized anytime soon.