Revenge effects are not side effects, rather they are a consequence of technological advances acquiring their own unforeseen momentum in ways that are experienced as unpleasant by humanity.
Examples include: the rise of drug-resistant bacteria in response to invention of antibiotics; the increase in road traffic as a resultant of the construction of roads; the increase in paper in efforts to achieve a paperless office.
Technology wants to hurt us. Revenge effects could end up destroying the world, or civilization as it is currently known.
In nature there are neither rewards not punishments -- there are consequences. (Robert Green Ingersoll).