Squareworld

is a world where everything is basically a square and circles are illegal. If you use circles, you will get in trouble by the Circle Police, and you will receive life in prison. However, some people have gotten arrested for using octagons instead of circles.

Trivia

 * The only person who was not arrested for using octagons/circles is Squarebot Reg, who simply got his go-kart taken away for having octagonal wheels. But later, a different Square Policeman arrested him much later when he confessed he had octagonal wheels.