"Revenge effects." Story can be found at the link. Always remember: the one unbreakable law is the law of unintended consequences.
Tenner writes: “Revenge effects happen because new structures, devices, and organisms react with real people in real situations in ways we could not foresee.” He goes on to add that “complexity makes it impossible for anyone to understand how the system might act: tight coupling spreads problems once they begin.”
-from this Farnam Street post