It's hard to speculate on the particulars, even hypothetically, because every case could be very different from the other cases. Once a person has been removed, there are other avenues by which a person may return to Canada.
Also, when there is a negative decision, there are a lot of people who do not get removed, even though they have had a “no”, because they are either involved in other immigration processes or the system is going through the proper steps with respect to that person's case. So it's hard to really suppose what a person would do, had they been removed from Canada. It really would be dependent on the particular circumstances of that person in the situation. I'd hesitate to speculate in the abstract.