On March 7, 1954, in a game between Milwaukee and Minneapolis, the NBA attempted to alter the game by raising the hoop height from 10 feet to 12 feet. This did not go over too well and the traditional height was re-established.
The International Basketball Federation, which governed the first Olympic basketball competition in 1936, mandated that players taller than 6 foot 3 inches were banned from playing in the competition. Once again, this did not go over too well and the rule was withdrawn when the U.S. objected.
Makes you wonder how tall the heads of the Federation were!