They generally only get what's coming to them when people stop accepting it. Part of not accepting it is warning the next guy if you clearly know there is deception going on, not to mention that it is just a good thing to do. You would want to know if it were you so you could decide how to proceed accordingly.
I would agree but if you believe what you're doing is right you don't look for validation. This whole thread would have had specifics and names, you can't waffle. That's why I say he should walk away. His deal ended with a refund which says the seller did his part. You don't get to sit back and pick and choose when you're going to insert yourself into someone's business. That's not right.
Where does it stop? Say someone buys it, do you then get to message them and say hey so what happened with the wrap? That's messy as all get out