Cynicism and skepticism are different beasts with different outcomes. Skepticism asks "Did they do it for X reason? Let's investigate." Cynicism says "They can only have done it for X reason. Let's castigate."

Cynicism is lazy. And generally, it has the effect of disheartening anyone from even trying to do the right thing. That people are cynical is of course understandable, but it's nothing to strive for.