We seem to have bottomed-out reply depth, but, to answer if there are other examples, the commonly misquoted "the proof is in the pudding" is the opposite of the correct one: "The proof of the pudding is in the eating."
My favorite "a few bad apples" is not a problem, which leaves out the second half: "ruin the bunch".
Especially when applied to police - the fact that the "boys in blue" turn a blind eye to the bad apples is what ruins the bunch. It's unintentionally accurate.
