In November of 1974, an attorney named Dale Cox wrote to his favourite American football club, the Cleveland Browns, and informed them that a number of the team's fans were regularly throwing paper aeroplanes in the stadium ? a potentially "dangerous" activity that could, he warned, cause "serious eye injury" to innocent fans such as himself.
His stern letter can be seen below, along with the now legendary reply he soon received from the club's legal department.
The Response: