You don't seem to be getting the picture here, and you still haven't responded to those who corrected you. The whole point of surveillance by the Minuteman is to spot the illegal entries. If the Mexican authorities know where the MM are stationed, the coyotes will instantly know as well.
The coordination...and governmental complicity... appears to be at a profoundly deep level. And the test of this thesis may already have been borne out...when the MM informed Border Patrol of their area of operations...suddenly... no illegal entry in that zone.