Taco Bell - Slippery Slope
Two grandpas sit on a bench outside a Taco Bell when a new sign goes up advertising their latest offering, the Waffle Taco. "What's next, a pancake enchilada?" Lenny asks. "It's a slippery slope, I tell ya," Harold laments. "It's a gateway breakfast," adds Lenny, who sees his grandson munching on a waffle taco. "Daniel," he yells, "you better not grow a ponytail!"
This ad plays with anti-drug lingo, substituting the taco breakfast for a joint. One thing leads to another, like loitering and ponytails, according to the old dudes, or even worse, harder-shell tacos.