The pleasure of chucking the stone through the porch window was fleeting for 11-year-old Jake: a tinkling noise, and a few seconds of mild excitement. For Diane, however, the effects were more acute. Her 14-month-old baby had been crawling under the window when it shattered. She rushed her child to hospital to check for injury, then took the next day off work for a second appointment. The day after that, Diane's...