I don't believe it, Tonchi. I think the International Drug Lords story is the state/feds trying to freak the public out of attempting to do a little harvesting for themselves, from the pot farms on public lands.
These have been around as long as I can remember, and yes, they have always been seriously defended with booby traps and shit. The guys fresh back from Nam knew lots of tricks. It wouldn't surprise me that the illegals are into it also, they're into everything else.
It might be the state trying to drum up federal money, too. Or the Feds in CA trying to provide themselves with a little job security without actually having to defend the homeland.