Im a born and bred Virginian, transplanted to Maine.
You just summarized my inital interaction with everyone in the Boston area.
It took me the longest time realize that "Hey a**hole, you stupid m*ther f*cker, what the F8ck"...was Massachusetts, NH, etc for "Hey stranger, I don;t know you yet...and maybe you're cool...but how you doin?"
I used to work for a retired Navy Commander, P-3 Orion pilot from Dorchester. The guy never cursed, ever, no matter what. He told me he grew up with the F-bomb as ever other word he heard in his neighborhood, so he vowed then and there never to speak it.