Many of the "sites" that these people dig in are sacred, the scavengers come and plunder. The Kiva societies are alive and well today. Just because people see this as "days long gone" does not mean that it has no meaning.
And when I say "my people" I mean A.I.'s collectively - I am not of the Peacefull People (Kiva Societies)- but we are all equally plagued by the grave robbers.
They should leave these things alone, it is not good to disturb the past.