Arg! Beware of the black spot! T-Shirt

Arg! The black spot is to be greatly feared, mate. Aye, look see what Wikipedia has to say, "The Black Spot is a fictional literary device invented by Robert Louis Stevenson for his novel Treasure Island. In the book, a pirate is presented with a "black spot" to officially pronounce a verdict of guilt or judgment. It consists of a circular piece of black paper or card placed in the hand of the accused. It was a source of much fear because it meant the pirate will be executed...The feature film, Pirates of the Caribbean: Dead Man's Chest, Captain Jack Sparrow is presented with a literal Black Spot by Bootstrap Bill Turner as a marker that the Kraken can track". Aye, matey, the black spot is greatly to be feared.