But Seph, there are a Billion Mexicans and they don't need the investment of training that Ninjas need. There is a good chance that the Mexicans will inadertantly shoot a Ninja in the chest after looking at Maria while the Ninja is stealthly flying over head....
Dirty horse thieves! We don't need no stinkin' ninjas! We just need Luna and her Navajo (EDIT - Sorry, Apaches. Geez, I was remembering somebodies remark about Navajo hair absorbing blood yesterday) friends to kick your asses back over the border!