Had roofers redo the roof awhile ago. I checked the lawn for errent nails thinking I'd find none or two. It went from mildy to infuriating.
I didn't really mind picking up the smallish pieces of shingles after. I get it, I've helped friends do their roof a few times. The rusty nails and staples though.... Took less then 15 minutes rolling a sweep under the eaves...