1. The guy is exclusive user here, so he paid somehow to become a member, there is a trace.
2. If he is a scammer I don't understand why he needs to post a message
"sold ( xxx$)". Why can't he just take the money and leave, why even to go and post anything?
3. Banning this user won't really solve anything, the real user might now even know that his account was compromised. The easy to guess password may be the cause of the problem, or dnforum db might be vulnerable. Taking down the forum won't bring any money, but imagine posting few domain names for sale a month through inactive user accounts - this can be really a moneymaker.
4. Don't trust anybody here unless people contribute to the forum, have many transactions in number, have reputation. To many people here I am ready to transfer domain name even before getting funds for it, but there are
many that can't be trusted right away. I have to be more careful now
5. I contacted e-gold, they blocked his account, but no way to reverse
e-gold transactions. For that reason I advise you all not to use e-gold or any other system that lacks any way of refund.