One solution that has become popular around the country is for a homeowner to stop making payments, mail their house keys to the lender (known as "jingle mail"), and simply walk away.
Some of the people involved with these scams have been real estate agents, lawyers, and mortgage brokers (among others); it seems like there is no restriction to which “profession” might stoop to taking advantage of the unfortunate homeowners who’re desperately trying to find a solution to their struggle to remain in their homes.