The killings the Scampia camorra is most famous for (or maybe it's better to say "infamous") had some innocent people as victims. For example, Cosimo Di Lauro had a former girlfriend of one camorrista tortured and burned for not saying where her former boyfriend was hiding while she probably didn't even know where he was and had nothing to do with him since a long time.
His hitmen also shot a young man who had nothing to do with the camorra because they mistook him for their intended target. And Paolo Di Lauro had some innocent relatives of the boss Antonio Ruocco killed (his old mother in particular).
I agree that most of the killings involve rival criminals, but the murders of innocents, even though relatively few in comparison, in my opinion are more than enough.