The Legend of Tennessee Moltisanti - S1-E8
Continuity mistake: When they drive in the Lexus, around 33 min into the scene, you can see the headrest on the driver's seat moving up and down as the shot changes from him to Tony and back. Happens several times. (00:32:55)
The Legend of Tennessee Moltisanti - S1-E8
Other mistake: Christopher Moltisanti fires a 2nd warning shot at a baker. The shot is fired at the floor but a mirror up on the wall behind the baker shatters. In the next shot and all subsequent shots, the mirror is undamaged. Now this gun was a prop gun, supposedly modified to fire blanks. How did the mirror shatter? It couldn't have been part of the planned shot. Christopher was aiming at the floor. (00:18:41)
The Legend of Tennessee Moltisanti - S1-E8
Revealing mistake: Christopher is in the pastry shop. When his head is turned to the left, an earpiece can be seen in his ear. (00:17:35)
The Legend of Tennessee Moltisanti - S1-E8
Visible crew/equipment: When Agents Harris and Russo knock on Tony's glass door from the backyard to ask him to open the door from the main entrance in order to explain to their kids that they're "having visits", as Tony closes the glass door, a stage light is reflected on it. (00:36:24)
The Legend of Tennessee Moltisanti - S1-E8
Visible crew/equipment: When Tony goes to the nursing home to hide all his weapons and the money into Livia's room, the camera and a big light panel are reflected on the car's door when Tony closes it, as well as the dolly track, which is on the steel bumper before the shot goes forward on Tony while rescuing the bag from the trunk. (00:23:01)
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.