I try not to get into the science of these things because it makes my head hurt.
I can only relate to my experiences of many enjoyable hours in the woods with deer. I don't believe we part time woodsmen can begin to understand everything of the full time woodsman (deer). I have come to a conclusion that most generally deer do not see us as much more than a temporary inconvenience as long as we do not continually pursue them.
I think they adapt to our habits very well. My first mature buck harvested came from the same location in which the landowner had finished chainsawing firewood 10 minutes earlier. I also jump deer quite regularly in my adventures but I do not make an event of it and go about my business only to see the same deer 45 minutes later. Granted I believe we can impact their immediate behavior by soaking the woods with our scent and bumping a wise one too many times, that is just part of the challenge of the hunt. I do not believe we can run them out of the woods when they have their business to attend to.
Many times when you observe them they seem to know how to measure "threat" by scent, sound or sight and will respond as needed to the situation.
I have always hunted in Iowa around row crops and cattle and have never felt any activity related to them has caused me any permanantly negative hunting experience. As a matter of fact, I have had my presence covered up by cattle or farm machinery activity more times than I can remember.
Deer do what they have to do. We do what we want to do.
BW's rules of bowhunting:
1) Deer can sense your thoughts and know if you mean them harm. So I always enter the woods thinking that I am their best friend.
2) The greater the bowhunters shooting skills, the farther away the deer will stay.
3) The closer the deer gets, the greater the amount of shaking that occurs at the bowhunter's knees.
We are to share this earth. Have a great year!