I suppose I shouldn't have said moron, but if I remember correctly, Swift had blocks of wood with those lo-pro tractors for drivers to back up onto so that when they dropped a trailer they were normal height. A lot of drivers didn't bother to use them.
They didn't have them everywhere, and didn't always have them in the trucks either. Those that can't bother to think about trying to raise the trailer to a proper height are morons. I just never fell into that category.