People aren't really this stupid are they? As popular as they are here, I seriously need to start a ponzi.
You'd be seriously rich from the commisions, say 1000 BTC get's invested. Say there is a 5% fee than you'd have 50 BTC from a few days/weeks of work. Still illegal though.
It's that last part that really stops me from doing it. I'm not the least bit interested in having the diameter of my asshole quadruple in size.