"By following the volunteers, the ACLU of Arizona is putting those involved in the Minuteman Project on notice that the violation of the civil rights of "migrants" will not be accepted, Ybarra said."
Seems to me if the Minutemen are on private property then the ACLU folks will be trespassing and subject to arrest.
Now, now, what makes you think that property rights are a concern of the ACLU? It's not like property rights are in the Bill of Rights!
Oh, dang, they are. Well, then, they aren't in the parts of the Bill of Rights that MATTERS!