I've just wasted 10 minutes of what's left reading all this doggerel. Too much speculation, fear mongering and position defending.
Safety while boondocking is a conscious decision based on awareness and experience. Only an infinitesimal amount will be left to chance. Not enough to worry about. You need a good sniffer. If ANYTHING does not look right, move on. We leave nothing outside the TC when staying overnight in the boonies. We have had a couple bad experiences while camping, both on named Jeep trails in the Sierra Nevada: The Rubicon and Barrett Lake Trail. Both had to do with too much liquor involved and those barrels of testosterone on the loose from those low-paying, mindless, big city jobs. This got so out of hand that Barrett was closed recently to all vehicles. Yet another negative sign is lots of large caliber spent brass in the dirt.
We try always to swim upstream while the masses are swimming downstream and visa versa. This is why we have an XTC to avoid the madding crowds by getting far, far away from pavement. It's good to have a 'gatekeeper' when going off-pavement. The road surface below cuts out a lot of the madding crowd:
In the city, with the blinds drawn and the lights off it just looks like no one is home, especially at the curb in an area where no one has a high ownership of the adjacent property. (learned this from one of my mentors, Tioga George) The Mexicans didn't mind:
Choose well my friends, choose well.
regards, as always, jefe