DHL plans to use people’s car for drop-off boxes. This may sound smart given that cars are the most wasteful assets, sitting idle 90% of time. However, the proposal to put packages in one’s car is quite risky. First, car robbery is quite common and putting valuable stuff in the car makes car theft even more rewarding. Now the expected value of robbing a car has gone up. Of course, technology can help deter a bit but let us not forget that thieves also become smarter. And they will find away to get around the security. Another issue is that people will get confused. If they see someone opening another person’s car, they are not sure if it is a robbery or delivery. Such confusion can cause inefficiencies of false alarms or not reporting a clear robbery. Thus, given these serious issues, it is unlikely that drop-off boxes will work.