Besides being completely illegal in some countries and extremely deceptive, ponzis have overtaken the gambling section.
https://bitcointalk.org/index.php?topic=494662.80I posted a topic in Meta about this to hopefully create a sub-board for these types of pyramid scams.
Maybe if enough people post in the thread, it will create pressure to create another board.
The admins have already ruled that ponzi's with their own website are perfectly fine for this section. I don't know how to convince them otherwise, as several of us have made very convincing arguments about how they violate the spirit if not the letter of the "gambling" forum.