It's hurtful to spread harmful conspiracy theories.
Donald sees a post on Twitter claiming that a classmate, Paul, is secretly plotting to shoot up the school, though Paul is out of town on vacation.
Donald wants to protect his school.
Donald investigates and finds out the rumor is not true, so posts what he found.
Donald retweets the rumor without investigating its veracity.
Paul finishes his vacation and returns to the school unharmed.
Paul's house is raided by police and his room his ransacked.