On a more serious note I do know several people who have gotten their residency in the U.S. through fake marriages. One of the downsides can be that unscrupulous people sometimes offer their services. What happens is half way through the process they inform the want to be immigrant that the price just went up substantially or else they are calling immigration officials, in other words extortion. People should be careful, this could be a reverse version(though I doubt it), you show up do the paperwork have the conversations that would incriminate you, just before you collect your money you are informed that this has all been recorded and for a fee you can get the recordings back before they are sent to the Federal authorities in the U.S.