"(A)tomic bomb, weapon with great explosive power that results from the sudden release of energy upon the splitting, or fission, of the nuclei of a heavy element such as plutonium or uranium."
An idea can have a tremendous impact because the people moved by exert a tremendous amount of wasted energy that results in psychical and physical wasted energy that causes the diminishment of human energy. You could say that bad ideas are the equivalent of "radioactive" because of the devastation they create in the lives and cities of the world.