Actually, unGrounded, baggage claim is in a non-secure area in most airports in Canada. Toronto's is secure in T2 and T3, but in other large airports, like Dorval and Vancouver, and in all the smaller ones, baggage claim is out in the open along with the meet and greet area. That's one of the reasons why I almost never take advantage of using lounge facilities on arrival; I'm worried that somebody will steal my luggage while I'm in there.