The bigger issue is why someone is so brash and immature to do it in the first place. Instant gratification and cheating have become epidemic. So this individual scores a dream job with stolen work, offered a decent salary and now he finds himself in the trenches doing the work he was hired to do. Not only does his work suck, he doesn’t have the skill set to work the problem, let alone find a solution. Where is all that creative juice now with a boss breathing down his neck for results? Not only will this individual get shown the door, he will be labeled a cheater and plagiarizer. It’s a great way to get yourself blacklisted in the creative community.
Glad to hear you called him out on it. If it had been my work, for what’s it’s worth, I’d bury him.