If I recall, in the book it mentioned Al's son (not the junkie one who was made) opened an Italian/Chinese fusion joint with a Chinese guy, pretty funny concept if you ask me, I think it had a kinda funny name too. I remember reading in another book that Al was a bit of dick, in prison he supposedly went after some really weak guys.
Firstly, that is a good idea for a restaurant.
Secondly, that does not surprise me.
From his Mafia Wiki: "Born in Brooklyn, New York, D'Arco's criminal career started at age 14, when he beat another boy with brass knuckles"
Does that sound like a tough guy to you? Sounds like a bully.
Easy to act like a tough guy and belittle Gravano, Casso and Amuso when you are hiding in witness protection and have your face blacked out and your voice altered when you are on TV.