There's a known lunch thief where I work.
He stole my lunch once, two years ago. I knew it was him; after some investigation regarding who was working the night shift in that building accompanied by some carefully-asked questions, it couldn't have been anybody else. I also found my food container in a trash can that sits right in front of the punch clock where there is a camera. I went to the company owner about it and he said "there's nothing we can do". I told him he could check the camera footage and see who tossed my container, but he replied "that wouldn't prove anything". I threw a big enough fit over it that the facilities manager bought me lunch the next day, and a supervisor bought me lunch the day after that.
Company rules are enforced according to skin color where I work; if you aren't white, you won't get in trouble for, or even questioned about, minor infractions like lunch theft or showing up to work 5 minutes late every day.
If I were to get caught habitually playing around on my phone during work hours, I'd get called into the office, lectured, and possibly get written up. If a non-white person is doing it, management stops the whole operation, gathers us in a circle, and gives the whole crew a lecture on how "we can't be doing this".
Indeed, that is what happened when a non-white employee thought it would be funny to tack weld the door shut on an employee restroom with people inside, and it was caught on camera.
