Exactly, Jim.
I see missing ground pins on the orange "heavy duty" extension cords for the vacuum cleaners used by the cleaning staff here at work.
The ground pin is a little tube, crimped at the end. They break off quite easily. In fact here at work, last week I found one of those pins dangling in the light socket here in my room!!
Usually just better to snip that piece of garbage off and install a REAL cap.
