In order to assist other motorists in identifying potentially dangerous drivers, it's now compulsory for anyone with a lower than average IQ and driving ability 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 exceptional low ability, additional flags are required.
However, we must all remember that to qualify to even have this warning flag, first drivers must have passed their test, thus allowing them to drive amongst others.