> Snowden's revelations proved once again that conspiracies are all false, because it is literally impossible for large numbers of people to keep their mouth shut.

That's both a good point and not so much. In the end, they didn't keep their mouths shut, Snowden spilled the beans and uncovered the large conspiracy. It's a good point with regard to "that would require a large conspiracy, and those don't work" not being a good argument against theories: there might be a large conspiracy that just hasn't failed yet.

And who knows how many more years or decades the large conspiracy would have worked just fine if Snowden hadn't leaked.