Indystar.com: GPS Will Pinpoint Coke Prize Winners

Next summer, Coke will use global positioning transponders in special cans of the soft drink to locate prize winners. Neat idea, but it begs the question - does Coke know that GPS coverage can be spotty indoors, where a good percentage of soft drinks are consumed? Additionally, what are the privacy advocates going to think of a soft drink can that broadcasts your location?