Stick a stacker above or below the box, and put a loop of cable in it. If you need to move, or pull some slack into the box... Give a good tug, and pull the loop out. The code only says that the romex be supported 12" before the box, and it is, when it is installed. After rock, if all goes choppy rocky... The slack you pulled is fished after the finish....
If you don't like the look of a loop, go from one side of the stud bay to the other, and use stackers instead of staples for the same effect.
"I understand the idea but given what my guys' first attempt looks like, I'd be afraid to see what they did the second time around."
Maybe its time for some training, or a good spanking. They do have to learn somehow....
