Blowback

Blowback is the unintended consequences and unwanted side-effects of a covert operation.

Stolen from Wikipedia:

Originally, blowback was CIA internal coinage denoting the unintended, harmful consequences to friendly populations and military forces, when a given weapon is used beyond its purpose as intended by the party supplying it. Examples include anti-Western religious figures (ie Osama bin Laden) who, in due course, attack foe and sponsor; right-wing counter-revolutionaries who sell drugs to their sponsor's civil populace (ie: CIA and Contras cocaine trafficking in the US); and banana republic juntas (ie: Salvadoran Civil War) who kill American reporters or nuns (ie: Dorothy Kazel).

In formal print usage, the term blowback first appeared in the Clandestine Service History—Overthrow of Premier Mossadeq of Iran—November 1952–August 1953, the CIA's internal history of the 1953 Iranian coup d'état, sponsored by the American and British governments, which was published in March 1954. Blowback from this operation would indeed occur with the Iranian Revolution and the Iran hostage crisis. Recent accounts of how blowback functioned in the War on Terror relation to US and UK intelligence and defense propaganda and became an important issue in a 21st Century media environment are discussed by Emma Briant in her book Propaganda and Counter-terrorism which presents first-hand accounts and discussions of deliberate and unintended consequences of blowback, oversight, and impacts for the public.