That's odd. I live down here by the border and do not feel like I am under siege.
I think it was katzendogs who said he/she/it had been to the Sonora desert and therefore knew all there was to know. He/she/it also got it wrong but -
For more than 25 years, I lived in the exact path they used and never felt that way either. Yes, they came to my door or I would find them drinking from the hose in my yard but not often. I would invite them in, feed them, let them get rested up before continuing. Sometimes I would drive them to where they would get a bus the rest of the way.
Oh and, there was never a problem with trash or their behavior. They were always very respectful of my property and always wanted to pay for any help I gave them.
There were groups that I saw every single year because they went back to the same jobs every year.