Those pics make my point pretty eloquently. There's 3 inches of daylight beteween the top of the front tires and the fender flares, and the rear end is squatted down like a hound dog passing a peach pit. How much weight does there seem to be on the front wheels in case of a panic stop or a need to make a sudden swerve to avoid a rock or a big rig tire tread in the road ahead? There are weight equalizing hitches that avoid the tongue load problems, and let's hope all those trailers are set up with brakes and an adjustable controller. Towing heavy loads any other way is just plain irresponsible, and dangerous to yourself and everyone else who has to share the road with you.
Jerry