For a Real Revolutionist, nothing can be completely useless.
If a thing, an anything, has any deficiency, then its opposite must be equally flawed. (You do know what this implies regarding the City sense of right and wrong, good and evil, etc?)
While a blatant, disturbing example may be properly kept waiting-at-the-door, a mere theory, a pleasant precept, or a proverb, is always welcome in the foyer.
Beware the linoleum of the mind.
No matter what their priests may sing, no matter how fine may read their chamber of commerce welcome signs, tarry not in a land where the people dress up their vegetables like little children.