Tara Maller, spokeswoman for the Counter Extremism Project, said governments have taken strides toward thwarting the Islamic State's social media campaign, but the online war is far from won. "The general opinion is there is a lot of work to be done," said Maller, a former CIA analyst. Twitter, Facebook, YouTube and the like have all cooperated with the government's efforts but could do more, she said. For example, plenty of content violating the platforms' terms of service still gets posted.