I was rear-ended in mine in about 1990 or 91. This little Nissan Sentra, that still had the temporary plates in the back window, hit me while I was stopped at a stop sign. She must have hit me pretty hard, because she managed to push me about three or four bronco lenghts into the intersection. Her car looked about a foot shorter, and the hood was taco'd up. My receiver made a nice impression through her radiator. I walked back to see if she was okay, and somehow her face had hit the steering wheel, and she was bleeding from her mouth or nose, but was otherwise okay. I was late for school, so we exchanged info and I went on my merry way. The only damage to the Bronco was a slight bend in the stock rear bumper.
That was when I still had stock suspension and 30" tires. With taller suspension, bigger tires and the resulting higher center of gravity, I don't want to get into a high speed accident. The roll bars we put on these things really aren't designed for that.