[Rebecca] MacKinnon [founding director of Ranking Digital Rights]... noted that while the board’s membership is illustrious, “it cannot stop the exploitative collection and sharing of user data, or stop the company from deploying opaque algorithms that prioritize inflammatory content to maximize engagement.”... Emily Bell, director of the Tow Center for Digital Journalism at Columbia University’s journalism school... said she is concerned that the board’s ambit is restricted (at least for the time being, it can’t hear cases involving advertising or the algorithm, and can’t discuss content that has been left up, only content that has been taken down)... [and] he fact that the board is stacked with experts in constitutional law and human rights means that those people can no longer participate in broader discussions about regulating platforms like Facebook...