I don't understand why everyone decides to turn on red without even pausing,
haha. That is fairly common in PA as well. A lasting impression for me, from the five years I lived in Boston, is that I never got used to folks making a left turn as soon as the light changes to green. I have it drilled into me that if you're making a left turn and you have a green light but not an arrow, then you must be patient and wait till all the oncoming traffic passes before turning left. I don't know about the rest of Massachusetts, but in Boston it was the norm for anyone waiting to turn left to immediately floor it when the light turns green and take the left before the oncoming traffic starts forward.
One time, we were going somewhere...I forget where, but I was sitting in the front seat by the driver...and we were at a red light about to go left, and the driver actually got a green arrow. He immediately said, "aw, man, a green left-turn arrow? There's no sport in that!" and acted frustrated as he made his left turn.
Seriously.
