Digital Delivery Items and Refunds

So what about digital delivery items on eBay. The good thing for the seller is that these have an unlimited inventory and almost infinite shelf life if managed properly. The bad thing is that once someone has it, they've really got it for good. So when someone asks for a refund on a digital delivery items, thats all they're asking for. There is no offer of return, or to delete the file from their computer. They just got your digital product and their money back. Now they have it for free. Some buyers do this because they are truly disappointed in what they have received particularly eBooks that are misrepresented in the auction advertisement. A few malicious scammers use this exclusively to get all the free eBooks that they want. They get away with by threatening negative feedback if a refund isn't given, even if your terms of sale specifically state there are no refunds. I tried to stand strong against this sort of feedback exhortion and yep got my first negative in what was my 5th year on eBay. Eventually I gave in to exhortion, after trying to get help from eBay proved futile. I gave the refund and we mutually agreed to withdraw our feedbacks. Feedback is a necessary evil on eBay, we have to live with even if we don't like the way its manipulated.