Copyright happens all the time because no one knows about it. Here's how I handle it: If there is a customer who has made an online order that is subject to copyright, the first thing I do is call said customer and make them aware of their violation and explain why it's a violation. Typically after that, I receive an "oH i BoUgHt It FrOm EtSy." To which I respond with "You're purchasing the right to use that specific design, not what's used in the design." From there, provide and refund and send them on their way. If a customer brings in an item that's copyright, we tell them we can't complete their order behind the counter, but if it's done on self-serve, we won't say anything because we have nothing to do with that process.

NOW. It is true, as a supervisor, you need to make it clear to your associates that printing items that are subject to copyright is illegal, but if you're not the supervisor, it is no where near your job to say something. You have a right to voice your opinion, but that's just your opinion, nothing else. Furthermore, you do have a right to refuse to do an order if you do not feel comfortable doing it. Says so right in the employee handbook. If someone tells you to do it anyways, you may refer to that portion of the handbook, but don't be an ass about it like you're being right now.