I'm 1 for 9 hunting axis deer behind high fence. So where's the guarantee? I have killed two free ranging bear using spot and stalk methods. It's doable. Yeah, sure your odds will decrease. The DNR might end up shooting them from the air at night using IR equipment. But, they'll get things in check...
I'd bet your 2 free ranging bear were shot in the mountains or in open country as well. That won't work in Minnesota my friend! It works in the mountains, open country, small woodlots, but not in a huge big thick woods environment. I have had chances out west in Montana to shoot a bear doing spot and stalk, problem was none of the times did I have a bear license but I still snuck up on the bear anyway to see how close I could get, It was exciting as hell! My dad has shot a hand full of bear out in Colorado in the mountains doing the spot and stalk, its very doable out there, but still tough to do. Congrats on the 2 bear doing the spot and stalk by the way, my hats off to anyone that is successful doing that! Your DNR quote has to be sarcasm.
You keep hunting your fences if thats what toots your horn. I'll keep doing what I'm doing.