'Enforcement only solution'? Hmmm... Where have I heard that now? It was LULAC, La Raza, or the Mexican government. The only alternative to 'enforcement only' is to address the root cause, which is the Mexican Goverenment. Would you like to invade Mexico, Ben?
Look at the US retirees moving in there. Did you know that the Mexican govt allows US citizens to keep US dollars in Mexican banks. Not to mention that the mexican banks are partially owned by US Banks.
As my compadre Luis Delgado was lamenting the other day, the damn gringos are going to own everything in Mexico.