The RO is minimum 2 years in 5. Anyone who pushes the envelope to get as close to 730 days is pushing their luck, and exposing themselves to secondary, as Depenabill has pointed out on numerous occasions.
As for inhumane, that's a significant stretch. As a PR you are free to leave at any time, PR card or not. Acquiring a travel document to return to Canada should be fairly easy (although possibly time consuming if you aren't prepared), providing you are in compliance with the PR obligations. Seems to me the only ones who complain are the ones on the cusp of missing the RO. How much of the "inhumane" treatment have people brought on themselves by pushing the envelope!