Fwiw, I work at an airport and common FOD items are broken-off roller wheels, name tag/labels, and "locks". Oh, and sippy cup holders from checked baby strollers.

Basically, if it sticks out from the item, there's a damned good chance it'll be broken off, sooner or later.

And the only "blown" luggage I've ever seen is the kind that has the wrap-around zipper that opens an expansion panel. Those zippers pop open easily compared to ones that just close the two halves together.