http://www.giava.com/sputott/

In order to assist other motorists in identifying potentially dangerous drivers, its now compulsory for anyone with a lower than average IQ to display a warning flag.

The flag (comprising of a red cross on a white background) will be attached to the top of at least one door of their vehicle.

For drivers of exceptionally low ability, multiple flags are required.

Really bad drivers also have the option of displaying either,

a single green and white flag with a dragon on it, or

a single flag comprising a white diagonal cross on blue background

but they usually don't get through the qualification stages in order to drive in the first place.............

http://www.kontraband.com/html/top_ten/movie.asp?ID=1377&fs=y&TTVAL=1