Words are dangerous. That is why governments sometimes want to suppress speech. The law of free speech reflects a settled decision that, at the time that law was adopted, the dangers were worth tolerating. But people keep dreaming up nasty new things to do with speech. Recently, the Islamic State of Iraq and Syria (ISIS) and other terrorist organizations have employed a small army of Iagos on the internet to recruit new instruments of destruction. Some of what they have posted is protected speech under present First Amendment law. In response, scholars have suggested that there should be some new exception to the law of free speech. Thus far, no workable exception has been suggested.
Entertaining Satan: Why We Tolerate Terrorist Incitement,
86 Fordham L. Rev. 535
Available at: https://ir.lawnet.fordham.edu/flr/vol86/iss2/8