Like many African governments, the regime of [Emmerson] Mnangagwa's predecessor, Robert Mugabe, was notoriously thin-skinned about social media criticism. Indeed, only two weeks before Mr. Mugabe was deposed in a coup last November, his government had arrested a young American woman working in Zimbabwe for allegedly tweeting that the country was being run by a "sick and selfish man." For now, the temperature seems to have changed. But if Zimbabwe's webspace has changed since the days of Mugabe, it also contrasts with many other African countries. Across the continent ... governments have increasingly targeted social media as a way to bring unruly dissenters to heel. In Tanzania, for instance, a recently introduced law slaps a registration fee of about $900 on bloggers and online forums. A 2016 law in Rwanda makes it illegal to use a digital device to cause "annoyance, inconvenience, or needless anxiety," and Egypt's government recently announced a law allowing it to block any social media users with more than 5,000 followers if they disseminate "fake news." In Zimbabwe, the new government has attempted to show its openness to social media as a way of visibly distancing itself from the autocratic regime of Mugabe, whose iron grip on dissent resulted in broad sanctions against the country that sent Zimbabwe's economy tanking. Mnangagwa has verified his Twitter account, opened a Facebook page, and set up a "broadcast list" on WhatsApp to send messages to his supporters.