that's a poor analogy - in your example cash is not created and doesn't affect the relative wealth of others - whereas gold duping affects everyone through hyperinflation..and as mystical said there's a risk to be taken..you don't dupe and expect to get away with a warning..
anyway he has a second chance....he could just use another account or something :)
Maybe it is a poor analogy but this truck is carrying cash from your local bank with your savings (you just went to deposit $10000) in it. This truck is also carrying 50% of it's cash holding. Now, what will happen when all this money is lost? Does it affect the relative wealth of others?
In the scenario that I have painted, people will go forward to grab as much $ as they can. Some will not for fear of law enforcers coming to them.
Sure enough, law enforcers arrived. Caught the people who grabbed the $. Some got away. This is what I am trying to illustrate.
What happened in RMAH is that it is "printing" a lot of gold. Some people grabbed it and they got caught and were banned. Some people profited from these "free" gold by flipping gems and they get to keep the gold.
Surely, there is inflation in the auction houses now but give it enough time. When nobody is paying for that inflated price, sellers will have to lower it.
What do you expect? Even without this dupe "fiesta", the $0.25 per 10 million gold would have the same effect anyway.
And of course they are given a second chance. This is why we are welcoming them back if they so choose to. :)