Makes me think that future proliferation of them is almost guaranteed, esp if a belligerents goals move away from trying to cause mass destruction in state-state way (doubly so as knowledge become more widespread, and cheaper to gather the materials for home synthesis), but effective deterrence in a individual trying to assert its sovereignty against any given nation/city state (like "hey, if you stop me, the dead-man switch on this mini thermo nuke will take out an area the size of an small/large airport and irradiate it for thousands of years")