Pushing the boundaries of polite society does not just fall under the purview of crime fiction authors.
I took classes taught by an elderly woman who wrote children's stories. She was polite about the science fiction and fantasy that I kept handing in, but she finally asked in exasperation, 'Can't you write anything normal?'
Fictions of law must be consistent with justice.
William Henry Maule
Politeness is a desire to be treated politely, and to be esteemed polite oneself.
Francois de La Rochefoucauld