Warning noun – The act or an instance of telling beforehand of danger or risk. Symbol and warning are semantically related. Sometimes you can use "Symbol" instead a noun "Warning". Nearby Words: warn, warned
Incompetence and Fat by Rob Grant have similar covers: A black background with the book's title and a parody of a warning sign (Incompetence has a "no IQ" sign, while Fat has the symbol for men's and women's bathrooms with the man symbol depicted as overweight).
Not only is their design and coloration with the Judge symbol on it unique, they include other special features such as machine guns and voice activated features like "crowd control" with the bike warning bystanders away under penalty of law via a built in loudspeaker.