For their own good, you see. This was the 1927 law that banned mailing of handguns through US Post Offices. The more things change, the more they stay the same. I’m reminded of this C.S. Lewis quote:
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron’s cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.
I think that describes a lot of our opponents in this fight.