The arrogance of those staying away is breathtaking. PEN exists to speak out for writers who are persecuted and threatened. As Salman Rushdie said, he hopes no one ever goes after the writers staying away. Still, it is easier to piss on dead cartoonists than to stand up to ISIS who crucify and behead.
In the last few weeks EU and US talks have resulted in calls for internet providers to create a means for 'swift reporting' and removal of material that aims to incite hatred and terror - a 'reporting' mechanism which could be used to stifle legitimate, albeit often highly distasteful or offensive, speech without due process safeguards.