I'm reading this thread thinking WTF Ont govt, licensed drivers are skilled / smart enough to tow a car trailer or similar without your interference but then I pass two car trailers yesterday. One, hooked to an mid size SUV with a full size 70s vehicle loaded on the trailer backwards. Second behind a standard cab 1/2 ton pickup with a similar size pickup also loaded on the trailer backwards. First tow vehicle had no business with a car trailer on the back let alone with a full size car on backwards. You sir are a complete and utter dumbass, endangering youself and everyone else on the road. Tower number two is no better, would be ok (ish) if the towed vehicle was loaded correctly but is also an accident looking for a place to happen with it on backwards.
Are they too stupid to realize what looks like a gentle dip in the road could partially unload or even lift the rear wheels of the tow vehicle off the ground? Before someone replies they've done it a million times with no problems, please keep in mind, just because you got away with it does not make your actions safe. Attended more than one accident due to the above in my former towing days. In each case, driver shocked by his vehicle without warning changed direction and crashing.
So as much as I despise govt interference, yes regulations are fine and dandy but there should be a training process and lic to drive around with several thousand pounds on the back of the family truckster.