We end up with bad loss and it isn't because someone isn't keeping up with the PPST, CAP, or other throw away. It is because an employee comes in while not on the clock and helps themselves. This person gets away with everything because they've worked their so long. The Lead and not even management will correct this person for any mistakes they make. They cross contaminate, leave messes, boss people around (including Lead), work slow, and helps themselves to anything. Those on the clock get the blame for any loss/mistakes because of this.
We have one of those also. You can go to management or your Lead, the next time it happens and let them know. If you're on the clock and get blamed, let them know then as well. I don't think anything will happen to the person or will change, though. But don't take the blame for something you didn't do.
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Get to your department, get off your phone, and do your job!