In a video from Ottawa, a broadcaster stares at the camera in silence as protesters surround him and scream expletives, calling him a liar and bellowing "freedom." Near the U.S. border in Surrey, B.C., a cameraman's equipment is shoved off his shoulder and two men spit on him. A demonstrator follows another journalist closely, yelling that he is a "disgusting, filthy human being," while police escort the reporter through a jeering crowd. Experts and advocates say the treatment of journalists, captured in many cases on video, during recent protests against public health measures should be a wake-up call.