To hijack my own post, there needs to be way more transparency on how these cases are decided. If merchants are given a set of rules to follow, and are told what information we must gather to prove payments are authorized, then we can go ahead and collect that information. If our customers refuse to provide that information, and we are faced with a dispute, at least we will understand why we have lost.
It's actually quite easy to get customers to provide proof of identity before completing a service. However, after a service is completed, it becomes basically impossible. If we know what to collect before delivery, we can collect it. And if we are confident that we have the appropriate information to win a dispute, then we can sell more confidently and increase our customer purchase limits through Paypal, thereby increasing the amount of revenue we accept through their service. It would be a win/win situation.