It almost seems like there should be a third option for dealing with people like this. I don't disagree that there should be a way for a member to get themselves off the PL but if they're playing the system or sit on the PL for X amount of time then maybe there should be another list that is reserved for such offenses. Either that or there needs to be changes made to the current policy that the PL is only to be considered a temporary punishment. Also, what about repeat offenders? If someone is put on the PL multiple times and keeps getting themselves out of it only when it's convenient for them to do so then shouldn't that be taken into account? After being placed on the PL three times, perhaps they should automatically be shuffled off to the HOS.
Questionable behavior doesn't have a time limit and I don't think that when someone behaves like kitsune has in this instance should be overlooked. How long will it be until he does it again? Letting him off the hook here is opening the door for a whirlwind of problems. It's not fair to insist RMA, whether you like him or not, complete a transaction with someone who, based on his response to the situation, could very well cause more stress for a guy who was just trying to sell some books by doing a charge back just to be vindictive.
Something should be done about this. What exactly that is though isn't 100% clear.