If you do enough reading on this topic, you will find that the defect does not exist in the explorer, and most likely not in the tires, however there could have been some defective tires involved. The problems arose when people didn't keep the air pressure in their tires up to the recommended pressure in their quest for a smoother ride. They would maintain a lower air pressure, which in the long run would cause these blow outs.
I had to deal with the same thing with U-Haul. I had recently purchased the explorer with the intent to tow. I was moving a few states away and I could not find a trailer to pack my stuff in! I called around U-Haul dealers, even argued that they would rent a trailer to a mountaineer when it is the exact same truck but still not the explorer - still no go. I almost picked up the trailer with a friends expedition then hooked it up to the explorer. I thought if something DID happen though, then insurance might not cover it...
Good luck though, something SERIOUSLY needs to be done about this!