Heh, from the security tab it says:
"The decision to travel is your responsibility. You are also responsible for your personal safety abroad. The Government of Canada takes the safety and security of Canadians abroad very seriously and provides credible and timely information in its Travel Advice. In the event of a crisis situation that requires evacuation, the Government of Canada’s policy is to provide safe transportation to the closest safe location. The Government of Canada will assist you in leaving a country or a region as a last resort, when all means of commercial or personal transportation have been exhausted. This service is provided on a cost-recovery basis. Onward travel is at your personal expense. Situations vary from one location to another, and there may be constraints on government resources that will limit the ability of the Government of Canada to provide assistance, particularly in countries or regions where the potential for violent conflict or political instability is high."
To paraphrase: If we find you we'll bill you.
But really, click on the security tab it is more specific.