Originally Posted by
twochai
It is not unusual for arrivals in Toronto to be met by Canada Border Service officers for a passport check. If they are able to catch undocumented offenders who have have 'lost' their passport enroute before they reach 'Canadian soil' at the top of the jetway, I believe they can send offenders back on the return flight .
Otherwise, it involves many months of expensive incarceration, lawyers, court costs and a heavy drain on Canada's welcome.
...and there is nothing more annoying.
Coupled with Pearson's general ineptitude and drawn out entrance experience it's an excellent time!