If they still had hangings, do you think there would be less crime?

In St. Augustine,  Florida, the oldest city in the USA, you can take a tour of the old jail and see the reconstructed gallows. They will tell you stories of local hangings, deplorable prison conditions and scare you at night with tales of ghosts stuck in those cement walls.

I'm thinking that erecting gallows in the center of most cities in the US might deter crime, or make for great photo ops.