I know that recently a user was reprimanded for doing this exact same thing. Creating multiple puppets and trying to sell them off. (Though I can't find the mod thread atm.. went back 15 pages and gave up.)
viewtopic.php?f=6&t=103031
This user in question has had a very troubled past here on NS. Perhaps it is time to send a sterner message to him? Cause it is pretty clear that he isn't getting the hint.
**EDIT**
Found it. In fact, it was the exact same user who created the thread before.
viewtopic.php?f=6&t=101395