Where crime is concerned, a potential offender can have a pre-crime accident, get injured or otherwise thwarted during a criminal attempt. The capabilities of any guardian can never be fixed (known) in advance of a crime happening. Even the Little Piggy in the house made of sticks might have leaped out of his demolished home at the very last minute and poked the Big Bad Wolf in the eye with a broken twig. Check out the hundreds of newspaper stories of have-a-go heroes (archived) if you doubt this. My criticism along these lines is included by my colleague Roger Hopkins Burke 2014 within the pages of his excellent best-selling text book "Explaining Criminological Theory" - pp.69-70). Similarly, Critical Criminologists Jeff Ferrell, Keith Haywood and Jock Young provide criminologists with my no punches pulled criticism of what's wrong with RATortunity (Ferrell, Hayward and Young 2015, pp 69-70) in the second edition of their excellent book Cultural Criminology: An Invitation. Furthermore, as yet another editorially peer-reviewed and in-print source for those looking for scholarly sources to cite these ideas, my original explanation for why the RAT notion of opportunity (Ratortunity) is a mere truism masquerading as causality is published in a peer-reviewed essay in the Springer Encyclopedia of Criminology and Criminal Justice (here).
Discovery of the greatest science fraud
Neither Cohen nor Young coined the phrase and concept of 'moral panic'