In 2006, not long after Mafia boss Bernardo Provenzano was arrested, a hundred shopkeepers in Palermo publicly declared their refusal to pay extortion to the Mafia, with Grassi's widow Pina Maisano, and son and daughter Davide and Alice, in attendance at public rallies denouncing the Mafia, jointly with the Addiopizzo movement.
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Following his death, his family have continued his campaign lending their support to the Addiopizzo movement, which is against pizzo.