PrincessFiona is right! There is no right or wrong way...just opinions. Obviously some pretty strong ones. So, isn't Giada De Laurentiis Italian? She has a show on the Food Network and is quite the chef right? Don't tell anyone but this Italian Chef has a recipe where it says to break...
I am picking tons of tomatoes and making bunches of pasta sauce which we eat all winter. We freeze ours. Still a bit timid to try canning. Most of the batches we like sweet and mix and match our varieties but a few batches we put in a good dose of our home grown hot pepper.
I started breaking when I had children. It's shorter that way and less chance of a problem for them to eat it. I never stopped since. It's easier to use a smaller pot and I can still twirl. Don't like the mess though. There is always a few strands that seem to fly into some hard to reach...