In my opinion, I doubt a FBI agent would write a story about the mob and glorify it to the sky top. There's a reason why most of the mob movies are mostly dramatic and tragic. Especially the one's which are made by law enforcement's hand.

As Five Felonies stated, they didn't show the heroin pipeline, they showed the bad side. Like you know what happens when little 16 year old kids living in a mob neighborhood would see a movie of the mob earning millions and nothing bad happening? NY five families would have now a double sized membership than it has now. I watched this documentary about hip hop stars that were in drug dealing, Snoop Dog in it stated, that the main reason why the amount of drug dealers grew was the Scarface movie. Every guy wanted to be like Tony Montana, because he had everything.