I'm not saying there hasn't been a few guys working in a gang mentality, some stupid, some more advanced. The bottom line is you can't rely on rats looking to get out of jail when Feds tell them to say "XYZ". Rats and will say anything to get an easier prison sentence. Every person that said they were involved in the Mafia was a person looking to feed prosecutors whatever they wanted to hear.
Better yet anyone caught on tapes talking about some king of organized criminal empire was tooting their own horn to sound like they are a part of this fantasy, furthering their toughguy criminal reputation. There is no Mafia.
I don't have to prove there isn't, you have to prove there is... I welcome your input.