This controversy reminds me of an astronomy professor of mine. He was semi-obsessed with showing that the moon landing was not faked, to the point of conspiracy-nut enthusiasm, despite supporting the status quo. He'd go off on long anecdotes in class about how he saw some light at such and such a latitude at a certain time, which showed unquestionably that there must have been a man-made vehicle at such-and-such a point. Then, he said one thing that stuck with me: if it were faked, that means there are at least hundreds, more likely tens of thousands, of low- and mid-level government employees who are keeping their lips absolutely, perfectly sealed.

That was all the argument I ever needed to hear to dissuade me from crackpot government conspiracy theories. Once an event reaches a certain magnitude of size, cost, and planning, P:Everyone stays quiet rapidly approaches zero. The payoffs and probability of a guilty conscience are simply too high with a large enough N.