maverick, you're wrong. Read the NBA history on Wilt. He ran from the foul line and dunked his free throws. They changed the rule. Alcindor played after the change.
Dunking was banned in the NCAA from 1967 to 1976. Many people have attributed this to the dominance of the then-college phenomenon Lew Alcindor (now known as Kareem Abdul-Jabbar); the no-dunking rule is sometimes referred to as the "Lew Alcindor rule.
All Wilt was told he had to stay behind the line shooting free throws.