After seeing this area in a no Booner area hold multiple booners decade after decade, I believe the secret is positive conditioning. Like with other animals, their behavior can be conditioned. If you have an area that has undeniable, blatant, wide borders, where on one side they are never molested, they should behave differently in that area. That's the only thing I can think of to make it so completely different from the other side. And, within that defined sanctuary, they are allowed to get old, free from harassment. So, when they see a person or vehicle on one side of the road or fence, they know where they are standing is safe. This is the only thing that makes sense in the case of this area. We're talking about an area where you don't even drive down surrounding roads and see ANY deer hardly ever. I don't know how large of an area it has to be or how long those conditions have to be in place, but it definitely works.