Sorry boys, but they are a bane on the landscape, and just because you can do something doesn't mean you should do it. I was a young lad stationed at Nellis AFB in 1974. I went with two other guys hunting mule deer up in the Shell Creek Range of east central NV. We camped in a deep narrow valley, and the next day I hiked for 4 hours to get up a steep ridge.
When I topped out and had this beautiful desert vista to my west there on the ground was a big oil stain, a used oil filter, and six empty oil cans, accompanied by 4 wheeler tracks everywhere. I remember how it bummed me out for the whole hunt. What idiots we often have to share the world with.