What are the worst laws on the books that are still enforced today? Can be state, local, or federal law.
For me, a few examples come to mind:
Marijuana – Recreational marijuana should be legal. It's pointless to lock people up for it.
Curfew – Local curfew ordinances in my opinion violate the 1st Amendment, specifically freedom of assembly. Also, they don't work. If someone is planning on committing a crime, they are going to commit it. They won't care whether or not they can legally be out at 2 AM.
Campaign Finance – Money does not equal speech. Period.
That is the exact argument against gun control.
Except restrictions on guns are easier to enforce than restrictions on going outside, and are morally defensible.