Let me preface by saying that I work for an insurance company. I have been told that a huge percentage of the vehicles that we total out and sell through a nation-wide salvage auction end up going south of the border. That being said, I encountered a group of similar vehicles headed south on US 81/I 35 in Kansas about a month ago.
I first passed a car flat towing another one, and noticed some kind of paper "license plate" on the back vehicle. A few miles later, I passed two SUV's hooked up, and then later, three cars tied together like this. A little bit later, I got to the freeway where the speed limit kicked up and there were two more cars tied together following a semi in the right lane. I pulled out to pass and the person driving the cars decided he should cut in front of me and pass that semi before I did. Problem was, he couldn't pedal fast enough to go the speed limit, or even make much headway passing the semi. Since I was a bit irritated at his stunt, I "drafted" him as he tried to pass the semi while going a scant 1-2 mph faster that the semi was. This worked for a little while until hunks of plastic and stuff started flying off of one of the cars and almost hit me. I backed off a bit until he got past the semi, then I nailed it and passed both of them. As I passed the cars, I saw that the towing car appeared to be a handful to drive as it seemed to be wobbling and bouncing, the hood was tied down with rope, and a good chunk of the grill etc was gone.
A ways later, I overtook what I assume was the "bosses" vehicle, a well worn Ford Excursion with Mexico plates. He's pulling one of those basic $1000 rail top flatbed utility trailers with two motorcycles crosswise on the front of the bed, a car loaded on behind that, and he's flat towing another vehicle hooked to the back of the trailer.
After seeing this, I surmise that they come north loaded up in the Excursion along with a supply of tow bars, bungee cords, duct tape, etc. They pair up their vehicles and run a convoy back south.
A few miles after passing the "boss", I had to make a quick pit stop. Soon after re-entering the interstate, I see the "boss" pulled off the side of the road with a big cloud of steam or smoke coming out of the Excursion. I wasn't sure if I should laugh at this redneck fiasco, or be mad that they may very well be endangering the motoring public.
After seeing this, I have to wonder how in the world they flat tow a front wheel drive or all wheel drive vehicle.