Campaigning against the use of crack, an ad by ad agency Talent called 'Crack Consumes' eats away at itself to scare potential cocaine users. Using mealworms, people printed on the ads were slowly consumed. The terrifying implication behind the ad being that if you use crack, you'll get your face torn off. The ad created an amazing visual effect of a head being slowly torn away at.
In order to encourage the worms to eat, the ads were printed on dough. Behind the dough, cubby-like compartments were filled with worms. With the insects trapped within a glass encasing, the only thing to eat was the ad. As a result, the ads were effectively demolished by the worms before the ad was removed.