^ Yet another example of how the directive has changed over the years. In TOS it only applied to pre-warp civilizations, and was to prevent cultural contamination. "No identification of self or mission. No interference with the social development of said planet. No references to space, other worlds, or advanced civilizations.", McCoy, Bread And Circuses. Interference was allowed as long as it was done 'behind the scenes', without the planet's population learning about it.
By the time of TNG, the directive had changed to become a catch all excuse for inaction.