I honestly don't think chargebacks should even be legal. It's people taking advantage of the system to get their own way when a dispute or claim doesn't go in their favour, so it gets taken into third party hands. (Their bank) Who will almost ALWAYS give the money to the buyer because they don't want to lose money themselves. Same principle happens when you try moving bank accounts. They don't want to let it go.
I've been on youtube a lot recently and found out that people not only open chargebacks after a dispute went the seller's way, but they still had possession of the item. That's just insane, and should be illegal to claim back. Chargebacks are seriously shady stuff and all I've heard of them is bad news.
Not one good thing comes out of a chargeback.
Edit: And if you want to say 'Well their credit card might have been used without their permission' - Seriously? If someone used my credit card without my permision, I'd go to the police. All chargebacks under unauthorized payments should have police involved, as it's identity theft. You really wouldn't issue a chargeback and leave the cops out of it unless you were looking to gain something from it.
If an item hasn't been recieved, there's Paypal AND Ebay's very own dispute centers for that stuff. I think that making a chargeback without valid reasons or documents should have pitfalls, but for the buyer there usually is no pitfall other than having to return the item OR to cancel the chargeback and apologise because they get away with it. The seller can potentially lose both the item they sent AND the money it's worth.
Edit2: And I realize the original topic is over a year old. The fact that this issue hasn't been sorted yet and the same problems keep coming up shows how full of holes the so-called 'system' is, and it shows where Paypal and the banks piorities lie.
