Mexico’s immigration law grants preferences to scientists and other professionals likely to contribute to “national progress.” Peasants with third-grade educations aren’t high on their wish list; in fact they do everything they can to keep them out. Local observers have often alleged Mexico’s brutal treatment of impoverished Central Americans crossing its borders. Yet according to Mexican officials, millions of uneducated, unskilled campesinos are just what the American economy needs.
There was a good documentary on Discovery which followed four Hondurans as they made their way through Mexico. They constantly have to avoid police and gangs which prey on them. A few get killed or maimed jumping on that train that they ride.
The ironic thing is Mexico has a law forbidding giving any aid whatsoever to an illegal...not even a glass of water.
The cops will let them go for a small bribe as that is the Mexican way.