don't even think it applies to most areas I hunt, in Tennessee and Kentucky. If that was true the deer would be in constant movement, especially in KY. Area is heavy agriculture, agriculture and people working it year round, and people riding 4 wheelers, atvs, etc. year round. We have zero control about people being there and most of the landowners let people ride outside of deer season all the time.
My favorite spot and the area around it, it is crazy, I can hear people at one house talking from almost a half mile away. No one believes it until you hear it. You know if a human can hear it, the deer can. If it spooked deer, then they wouldn't even be in that area of woods.
I use to love for to get a phone call when in a tree in a couple places in middle Tennessee. It happened so many times that a deer and sometimes a nice buck would show up after I had been on the phone a few minutes, that I would get excited when someone called.