Under normal circumstances, Madison Avenue would love Augustine Gizzi, a New Jersey truck driver and a true believer in advertising slogans. Trouble is, Gizzi not only believes, he goes out and acts on his beliefs. As a result, he has cast a legal pall over scores of sloganeers ranging from Avis ("We try harder") to Westinghouse ("You can be sure if . . .").
Gizzi had no qualms when he bought a supposedly overhauled 1958 Volkswagen van from Russell Hinman, who operates a Texaco service station in Westville, NJ. Though Hinman made the $400 sale on his own as an individual, Gizzi...