Somehow I doubt a single person from Canada calling to complain is going to get the same level of attention as a juicy Online Forum Exposé.
That said, I really hate to see a brand name getting dragged through the mud on the Internet every time somebody carries a grudge - justified or not. This one, however, seems systemic enough to be a genuine problem as folks from Canada down to FL are having the same problem. I wonder how long this "batch" has been like this? I can't imagine PM doesn't use some kind of automatic measurement or filling procedure. Do they eyeball the filling of every can?