While I'm as opposed to crime as much as the next person, it strikes me that crimes such as shoplifting, pick-pocketing, or burglary must have their own fascinating histories of creative tools, inventions, and design. I imagine that one element of the design against crime process resembles an arms race of sorts, with each side trumping the other's latest tactics and technologies.
With all the time you have spent thinking about designed objects that foil or frustrate criminals, do you ever think up designs to assist these acts? Is a splash of criminal-designer roll-play a part of your process?