A few years too late for me :-)
Was in Glacier National Park for my father's memorial service, driving to some of the spots he loved and was having a good time remembering him when I drove up from the boat launch area to hear a strange dragging noise. Drove around for another 20 or 30 minutes till I got back to the camp site and got out to see the luggage rack hanging off the roof on one side. It pulled the rack all the way back and bent it enough so I could reach up and snap it off, never did have a use for that. The part that made me the maddest was the cap for the bathroom sewer vent was gone as well. Went home and bought a new vent, filled the holes from one of the anchors for the rack and went on with life. A trip or two later I was coming up from the same boat launch and heard a noise, this time I stopped and picked up my sewer vent and put it back on. After that trip I put a strap over the vent to secure it!