NC congrats on your wife's visa and about her friend, this lady sounds like a lot of people out there that have nothing to lose so they decide the risk is worth it, they obviously want to be in the states badly enough to take such risk, which is a much bigger than the one a card shark would take.
There is so many ways to get in the states the wrong way, how about you give your wife's friend some ideas get there the "right" way?
P.S. if she decides to do it the wrong way, please remind her to say she is mexican, like most latinos do, that way she will be deported to Mexico, not all the way back to her country and she can gives us an even worse fame