Bassically I think that the scenarioius that happened in the Sopranos happen in the mafia all the time however it's just much, much less public, beatings like this would happen in more "Mafia plagued" areas than in a busy, urban street somewhere. Although you always get crazy, cowboy scenarios, always...

I read of some Gambino associate get stabbed by a Colombo associate over money (Obviously) and the guy ended up in hospital and it was in broad daylight...