The mountains around here are filled with pot growers, the bad ones from the cartels according to DEA. My ex runs a unit for Riverside under the auspices of the DFG, and her people have run into fertilizers, camps, irrigation piping and more in the local mountains. DEA talked with them and told them that when they find things like that, pretend they don't see it and keep walking. Of course they like them to GPS the locations also :-)
So, I guess it's important for any of us to be careful of those things also, though the pot locations are usually a bit more remote.

"Turtles, Frogs & other Environmental Sculpture"
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