Authors:

Politeness is wasted on the dishonest, who will always take advantage of any well-intended concession.

"Flock of Dodos: Behind Modern Creationism, Intelligent Design and the Easter Bunny". Book by Barrett Brown and ‎Jon P. Alston, 2007.
Politeness is wasted on the dishonest, who will always take advantage of any well-intended concession.