Islamic State's Challenge to Free Speech - Bloomberg View

To minimize the danger to free speech, it might be best to combine Hand’s approach with a form of balancing: If (and only if) people are explicitly inciting violence, perhaps their speech doesn’t deserve protection when (and only when) it produces a genuine risk to public safety, whether imminent or not. That approach would essentially retain the high level of protection that is now given to political speech and dissent of all kinds.