A friend of mine regularly forwards me NAVCAN's daily incident reports. I've noted that WestJet flights regularly (i.e. more than two or three times a week) have reports of disruptive passengers. i.e. where police/security are requested to meet the aircraft. Disruptions include smoking in the lavs, fighting, drunken behaviour on board and at the gate, stealing from the drinks trollies, drinking own booze (and refusing to stop) etc.
Once in a while you might see something from an AC or Jazz flight but probably only once a month or so.
No comment on the quality of the passengers, and perhaps AC doesn't ask for assistance (or report incident to NAVCAN). But one does wonder.