Everyone probably has 'horror' stories.
A few years ago, saw where the siding guy's had driven a 16P nail for scaffoldling into the back of Service panelboard. Luckily the nail did not hit an ungrounded portion of the panelboard.
And like Alzappr noted, the drywall usually does not have the 'body' for the screw to thru the metal plate.
Then again when drywallers fasten the drywall to one side of the stud, the metal plates 'fall off of the studs' on the opposite side.
