So, in Michigan we have this thing known as the bottle & can return. Basically you pay a 10 cent deposit on every soft drink container, and get the money back when you return them. So from an early age, Michiganders are taught not to crush the cans, since the return machines can't read crushed labels.
Ontario doesn't have deposits, cans are just recycled like normal metals.
It is socially acceptable in Ontario to smash cans.
One of my dorm-mates did it in front of me. I obviously cowered in response. It honestly feels to me like taking a dime out of your pocket and chucking it into the garbage.
So now, they have a new fun way to torment the American. Grr.