^This, really. If anyone here honestly believes they don't have databases of all the transactions/mail sent in game, then you clearly don't have much experience with MMOs. Everything is filed and tracked to easily remedy these situations exactly. As for balancing the economy, rather than relying on a wipe, the community…
I don't think a full wipe is needed. If they were to simply reverse -all- transactions since the start of the beta, then all the exploited AD/Zen is removed, and those that have made legitimate transactions would simply just re-do said transactions. Pain in the ***, but it's better than a total wipe for all those that have…