OK - I'm the new guy, I don't know any better, so I'll bite and be the one to talk about the elephant in the room. I would humbly submit the following for your consideration...
Would a rational and responsible person pull a trailer that exceeded the load rating of the tow vehicle on a public road? Does it really make sense to unneccessarily risk your life, and the lives of others sharing the road with you?
No to both questions.
Locally an innocent teenage girl was killed instantly by some clowns in a pickup truck and heavy trailer that went out of control, crossed the median, and hit her head-on.
Even at slow speed the weight of a Mac has enough kinetic energy to do considerable damage. The tow rating of a vehicle is based on many factors, all based on the ability of the vehicle to control that weight with a given safety margin. Exceeding those margins is taking a huge risk. With other peoples' lives.
Try this. With no traffic around try taking an evasive manoever to avoid an imaginary obstacle on the road at slow speed (hard left-right-left on the wheel) and see how unstable and sluggish you are even when within the proper load rating, then imagine how that would be in a real emergency at higher speed, and with a lighter vehicle!
Also think of the liability if someone were injured! And as others have previously mentioned, see how much interest the insurance company would have then. In some jurisdictions it might not even be illegal, but in all cases I think it would be unwise.
Please correct me if I am wrong, but I fail to see any grey area here at all!
