No, it doesn't come from Vizzini. It is an inference made from the fact that Adonis functioned as a Capo on the New York docks. The main thing happening on the docks was not union racketeering, nor was it hijacking of freight merchandise. The main thing happening on the docks, and still might be happening, is trafficking. Understand the Octopus. It is all one. "Satan cannot be divided against Satan."
According to his biography he may have headed up the Broadway Mob during prohibition. I haven't seen anything in his bio that says he was a Capo on NY docks, although he was closely linked to Anastasia in Brooklyn. When he lived in Brooklyn he was a political fixer in the local Democratic party. I've seen him linked to gambling, cigarette vending and extortion activity but never narcotics. Any drug activity was probably compartmentalized and controlled to specific people.
During prohibition the big cash cow for OC was illegal alcohol. Valachi said during his 30 year career as a Luciano/Genovese soldier he never got involved in drugs or "junk" as he called it, until about 25 years of living that life. If you consider that he belonged to Bender's crew, this is very significant. When he was found dealing, a big fuss was made and things began to change and the attitude toward narcotics loosened up, especially when Costello was pushed aside.
