I'm a little concerned about what this thread shows us about the community here. First of all, if there is a bug so massive in consequences and yet so easy to exploit, why is an admin publicly telling everyone exactly how to do it and under what conditions it happens? You have just put a gun into the hand of every child and are hoping that not a single one of them pulls the trigger. A bug like this should be confidentially disclosed to admins or developers. Developers should make an announcement about it, briefly explain the symptoms of the bug but not how to recreate it, say they are working on a fix but also give a word of warning about anyone who wishes to exploit further before it is fixed.
Also, as far as placing blame goes, I'd have to imagine there is a relatively easy way to track the IP of whoever performed what action. Each clan ladder has a journal of everything that's done, there's has got to be a similar thing here and if there isn't it needs to be implemented.
In the future, I would wish to see a better system put in place, possibly one with rewards for bug finding. If there was a proper reward for disclosing bugs to developers, the players who knew about this bug for quite a while may have spoken up and got a loom point or something, instead of keeping it in their back pocket and using it to screw someone else over when the opportunity arose.