The worst, the best, the possible

In addressing a class of would-be writers, J.B. Singer said,
"Tell us about lust and denigration, treachery and adoration, senselessness murder and wanton love. Give us tension, fright, excitement. If one character says blandly, 'Good morning,' the other character must say. 'Drop dead.' Let your imagination go. Nothing can be worse than the way human beings behave."

Is this true?
If it is, make it a lie.