Earlier quoted context omitted.
I heard a story, but I have no idea whether it's true: bike shop in San Francisco leaves very shiny, high end bike outside. Thief hops on bike, heads down hill to make a quick getaway. Thief soon discovers that the bicycle's brake cables are not connected. CRASH.
I believe that it's illegal to booby-trap one's house, and I've heard of (apocryphal?) cases of burglars suing homeowners for injuries sustained during a burglary... I imagine such a brake-less bike would fall in that category.
This is the only case I could find on wikipedia. Placing a bicycle outside with no brakes hooked up is a far cry from rigging a spring loaded shotgun to the door of an unoccupied building.
It isn't even unheard of for people to legitimately (well, not legally I think...) ride bicycles without brakes, so where would you draw the line? If the police used a Ford Pinto as a bate car, could they be similarly at fault?