Thanks Kizmo and thanks also to the others who voiced differing opinions.
I am new to predator hunting, having had a false start a couple of years ago and failing to continue with it, mostly out of frustration at my utter lack of success. PM seems to have helped install a basic idea of where to begin, but that will be proven out over the next couple of months.
FWIW, while new to predator hunting I am not new to hunting other animals. My experience informs me, I think correctly, that animals can be "deconditioned" from natural behaviors and "learn" (i.e. be "educated") to avoid hunters, their decoys, calls, etc. I think the deconditioning is temporary and, for the most part, so is the "learning."
The easiest to describe and envision would be the progression of deer seasons and waterfowl seasons. It is impossible not to recognize a change in the behavior of deer, ducks and geese attributable to hunting pressure through a season.
But, with a few exceptions, each year the new season begins with the deer, ducks or geese only as wary as they were, and behaving the same as at the start of the season the prior year. A couple of notable exceptions would be older bucks and older geese. The "learning" seems to stick better with them.
Our deer seasons and our waterfowl seasons are broken up into segments here. I don't see any reversion to unpressured, normal, typical behavior between segments in deer, but I see some with with ducks and to a lesser degree with geese as well. But I'm not sure if what I am attributing to a reversion to normal, typical behavior with ducks or geese isn't more accurately largely or entirely attributable to new arrivals either.
Interestingly, in my experience a really good hunter can hunt more often and kill a heck of a lot more ducks, geese or deer without adding much hunting pressure compared to lazy, inexperienced or inept hunter. His presence is less obtrusive, he is more effective in less time, he leaves fewer deconditioned or "educated" animals, he gets busted a heck of a lot less often.
I suspect what the fellows from Utah are witnessing is a lot of either lazy, inexperienced or inept hunters deconditioning or "educating" coyotes.
A good hunter can succeed even with the most deconditioned or "educated" game though. His success ratio may drop and he will have to cross every T and dot every I to be earn his success. The two things I have learned for certain are that you if you take shortcuts your success WILL drop and your success rate from the couch is definitely going to suck.
JPK