Motorcycle on back of Travel Trailer

I see people loading big twin Harleys on the backs of pickup trucks and towing trailers at the bike weeks. So are way over their load limit. I also see people pulling bike trailers with their bikes on them, behind the 5th wheels and travel trailers. It looks like an accident looking for a place to happen. The 2500 and 3500 series trucks seem to handle the bike and hitch weights pretty good when hauling a motorcycle. It seems to me that the frame on a travel trailer is no where near intended to carry that much extra weight cantilevered off of the back of the frame. The solutions are a big truck or a toy hauler.

And, some of the toyhaulers are barely enough. The folks that camped near us said that when they had their bikes in the trailer it flexed so much that they couldn't open the side door. Only the rear ramp could be opened/lowered.