I voted no for two reasons.
1. If any state that own NW would destroy it, the only state on earth with NW will be Israel. Because if Israel never confirmed owning of NW, I am sure as hell that Israel will never destroy not a single nuke. And I dont even want to imagine a world, where jews will be the only owners of NW.
2. Technological reasons. Power of nuclear explosion may come in hand in future. It may sound silly, but nuclear explosion may be used like in that movie Armagedon.