The headline-grabbing matter of Trump’s account is little more than a distraction, critics say. “The fact that Donald Trump is unable to express himself on Facebook is less important than the fact that all of his followers and supporters continue to express themselves on Facebook,” says Siva Vaidhyanathan, a UVA professor of media studies, who is not affiliated with the alternative board. “The phenomenon that we should be worried about is the aggregate message that undermines democracy, divides societies, spreads hatred. That continues, and Facebook either can’t or won’t do anything about it.”...