Project leaders should not worry unduly.

Maybe they shouldn't worry, but they always do.

Note the new rules imposed since the Snowden leaks, such as the two-man rule for accessing sensitive files, and a stronger concern for vetting (which inevitably slows down recruitment and excludes some good people).

In general, bureaucracies always respond to scandals with excessive new rules that slow down all work for everyone.

All it takes is a reasonable probability of one leak, and project leaders get uptight.

I'm not convinced that it is true that intelligence is correlated with rule-breaking or anti-authoritorianism. What's your evidence, aside from anecdotes of individuals like Turing and Feynman?

It's a good question, and other than a general impression and a wide variety of slogans ("think out of the box," "Be an individual" etc), I don't have any evidence.