When Bob Rasmussen was trying to find a used barbecue grill last month, he turned to Facebook Marketplace. He was discouraged when he tried to log on to Facebook and failed repeatedly. It took him several minutes to determine what had happened. Rasmussen is a member of the Mid-Missouri John Brown Gun Club. Facebook had taken down the club's page and the personal accounts of all of its administrators and moderators. "Community defense though community action" is how the Mid-Missouri John Brown Gun Club describes itself...