One of Abbie Hoffman's well-known publicity stunts took place in 1967 when he led members of the Yippie movement to the Exchange's gallery. The provocateurs hurled fistfuls of dollars toward the trading floor below. Some traders booed, and some laughed and waved. Three months later the stock exchange enclosed the gallery with bulletproof glass. Hoffman wrote a decade later, "We didn't call the press; at that time we really had no notion of anything called a media event."
Parks collaborated with members of the League of Revolutionary Black Workers and the Republic of New Afrika in raising awareness of police abuse during the conflict. She served on a "people's tribunal" on August 30, 1967, investigating the killing of three young men by police during the 1967 Detroit uprising, in what came to be known as the Algiers Motel incident.