One thing I would say is unrealistic about The Sopranos is how they were able to discover and kill off all the rats. This RARELY happens in real life, in America at least. These days you have rats moving back to their old neighborhoods without two fucks, and few real-life wiseguys were smart enough to discover any rats. Even to this day they still get caught talking on body mikes, and even having induction ceremonies taped! This was understandable when it first started happening, but totally unacceptable that they're still falling for the same old tricks!