I'll consider "rats" to be anyone giving information to the authorities concerning organized crime, whether they themselves are members or not.
- Ray Curto (Season 3? - S.6) - Adrianna La Cerva (S.3? - S.5) - Jimmy Altieri (S.1) - Sal Bonpensiero (S.1 - S.2) - Jack Massarone (S.5) - Febby Petrulio (Pre S.1)
Am I forgetting any?
I would personally say that the show is not unrealistic in its amount of rats. From 1999 - 2004, when we have been watching Tony and the Soprano family, they have only been 2 really major rats (Big Pussy and Jimmy) two ones which nothing really came of (Adrianna, Jack Massarone), one which occurred before the show started (Petrulio) and one which we have yet to see what will happen (Curto).
I'd say thats about realistic. The unrealistic thing is the fact that all of them have been killed so far, besides Curto. Most rats seem to go undetected. Petrulio was able to put away his cohorts, but ultimately paid the price as well.
Edit: I forgot about Jimmy Petrille, at the very end of last season. He wasn't ratting on the Sopranos, but he was a rat nonetheless.
