If you wanted to do that you could just release a cancer-causing agent and it would similar mess with their DNA and kill them much more effectively at a fractio

If you wanted to do that you could just release a cancer-causing agent and it would similar mess with their DNA and kill them much more effectively at a fraction of the cost. Or just blow them up or something. Harming the masses in such a roundabout way won't leave the realm of science fiction because it is so much less effective and so much more difficult to do than existing methods. Not worth worrying about even in theory.