As described in the book, owners/transporters are warned against towing a DeLorean car backwards without securing the rear louvre/sunshade in place. These photos (courtesy of Josh Quellhorst) illustrate this quite plainly.

In addition to obvious broken louvre (~$500 new), BOTH the stainless quarter panels and the t-panel are damaged. A good stainless repair specialist should be able to fix these, but it won't come cheap and it's likely repairs will come close to the same cost as replacement. Nevertheless, this could have been much worse - other incidents like this have resulted in damage to the tops of the doors, windshield and hood, as well.
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Thankfully, this wasn't Josh's car, but his photos illustrate quite plainly how much damage can be caused by not exercising the proper precautions when transporting a DeLorean. Thanks for allowing me to share these photos, Josh!