Hamas is banned from most social media as a designated terrorist organization, but as The Washington Post lays out, it’s used a popular Telegram account to “strengthen supporters’ resolve, stir up anti-Israel rage in neighboring countries, defend its militants’ brutality and induce sympathy to the plight of Gaza.” As The New York Times wrote yesterday, it’s also recently hijacked hostages’ social media accounts to spread terror and propaganda — in ways that are particularly hard to safeguard against.