Visible crew/equipment: Right at the beginning of the episode, Chris pulls over in front of the Bahama Skies tanning salon to pick up his pay. The shot shows him in the car. As he exits the vehicle, the cameraman can be briefly seen in the reflection.
Visible crew/equipment: When Furio goes into the massage parlour, Furio is going towards the back, and the door on the side gets flung open. You can see that it doesn't open all the way, and tube lights are visible. (00:40:45)
Answer: It's a mafia thing. Taking food off another made man's plate in public view like that is comparable to the guy in Casino taking off his boots and putting his smelly feet up on the table.
It is not a "mafia" thing, it's basic manners and plain gross for another person to stick their fingers into a plate of your own food. Same with the feet on the gaming table scene in Casino. It's not a "mafia" thing, it's just rude and not something a person does in public.