Home inspectors will flag this every time. I have purposely done this twice at a couple of my friends houses that were going to be inspected just to mess with the home inspector. I have had a few tell me this was "illegal".
you really want to mess with a home inspector, tell him he violated 70E for opening a panel without his PPE, and he risked life and death. Then explain his insurance may not cover him for doing unlicensed electrical work.