One of the biggest problems Nickelodeon had with the show before it premiered was with Dib 's design . Jhonen wanted Dib to wear a trench coat , but Nickelodeon opted against this because they feared Dib 's clothing would remind people of the Columbine High School massacre , in which the two teenagers responsible for the shootings both wore trench coats during the attack . Nickelodeon ultimately lost this fight and Dib ended up wearing a trench coat in the show
Columbine High School massacre
Columbine High School massacre
Invader Zim