FROM deepfake videos of Indonesia's presidential contenders to online hate speech directed at India's Muslims, social media misinformation has been rising ahead of a bumper election year, and experts say tech platforms are not ready for the challenge. Voters in Bangladesh, Indonesia, Pakistan and India go to the polls this year as more than 50 nations hold elections, including the United States where former president Donald Trump is looking to make a comeback. Despite the high stakes and evidence from previous polls of how fake online content can influence voters, digital rights experts say social media platforms are ill-prepared for the inevitable rise…