Zazen has it right on the head. And if you think that the US government wouldn't go after you if they found out about it, I think you have another thing coming. If you're receiving "good faith" money from Nigerians (which is basically what you'd be sending), the government would love to prosecute you as an American crime affiliate. With our government essentially helpless to stop the Chinese counterfeiting problem and the apparent implosion of the economy, they'd be more than happy to create a scapegoat and try to get as much media attention as possible.
Also, you'd need a false identity pretty well established already. Many overseas crime syndicates do have people established in the US, and I know I've already read stories about people trying to scam Nigerians (or just pull out of the scam) after they'd been scammed themselves only to get roughed up, mugged, or kidnapped and taken to Nigeria or other countries to be ransomed back to their families. They may be stupid, but you're dealing with professional crime syndicates here, and even in the third world, the mob never forgets.
Great idea, but totally not worth it.