According to the New York Times

One of OPEC’s concerns is that oil prices will quickly climb to a level where many car owners decide to switch from sport utility vehicles to compact cars, or possibly, to public transportation or carpooling. Such a change in driving habits, while still considered unlikely, might produce a scary outcome for oil-producing countries: a crash in oil prices.

You mean, like, the best way to stick it to the oil barons is to drive less? Riding the bus helps boost our national security? I’m shocked, shocked.