That's not always possible. A few years ago they had a major tornado outbreak around Huntsville, Al. Some friends of mine were without power for several days. They borrowed a generator but could not get any gas for miles around, so we took them about six cans of gasoline. We had a truck, so that was what we used, but if it had been an SUV we would have done the same thing as that picture.
Yeah, what's worse, carrying half a dozen cans of gas on the rear of your vehicle, or taking a picture of someone doing that while you are driving.