Well for some years there are nearly no mafia related killings
in US, only a few and nothing compared with the old days. I know there might be some kind of banns for killing within the organization, the top guys would like to earn quietly without cause any public notice.
But problem is, just like Henry said in Goodfellas, shooting and killing each other is a habit for those people, so
apart from those hits approved by higher ups, there should always been some killings result from personal beefs and other shit, like in Sopranos Tony beat Ralphie to death, or even civilians could be killed because these guys are still mobsters, but it seems we even dont really hear about these things in these days, kinda wierd for me.