A CNN story on Tuesday about an anonymous Reddit user who created a widely circulated video of President Trump wrestling the network’s logo to the ground has inspired multiple backlashes. Some criticized it as a form of blackmail. Others raised issues of journalism ethics over the network granting conditional anonymity to the user. CNN reporter, Andrew Kaczynski, said he had confirmed the user’s identity and had spoken to him by phone. But the article by Mr. Kaczynski did not identify the user as anything more than a “private citizen.” Mr. Kaczynski later said on Twitter that the Reddit user was a “middle-aged man.”