I don't understand your argument: if the shady things they're doing have gotten leaked, isn't this because they were doing those shady things in the first place? Can you conclude one way or the other that the net is so loose that bad things will always see the light of day? Don't forget that with PRISM taking 6 years to be disclosed and MKUltra having taken 22, a lot of people rightly don't have such idealized views anymore.