No,

one of the most important tasks of fiction is to provide a way to act out our darkest needs and fantasies without harming REAL people.
Everyone has this dark side. So what do you think, is the better way: denying and oppressing it or finding a catharsis in fiction and fantasy?

The problem is: If 1000 people read a violent nonconsensual BDSM-story, you will never hear from the 999, who satisfy their dark needs with the cathartic effect of the story.
But all tabloids will tell you about the one sick idiot, who got an inspiration from the story to commit real atrocities.

History proves, if you allow nonconsensual/violent fantasies, you risk criminal/cruel INDIVIDUALS.
But if you oppress these fantasies, you risk a criminal/cruel SOCIETY.
Or do the dictators of the world encourage their people to find catharsis in dark fantasies?
For example, what movies did we have during our "Third Reich"? Almost everyone was about love, music, romance and fun...

So much for a better world in fiction and fantasy.