Well I am not around for 100 years, but I guess it hasn't. They might get some education, since in heavy hunted areas they are skittish as hell and they would be running at the very first sign of a human proximity - that might be a difference according to 100 years ago. When I was in Zim (May) we were realy pushing them hard and it was only at one occasion when we bumped them 5-6 times that they circled the tall grass and returned to the same patch of jesse they were bumped out of. Only then a PH advised that we are wearing them thin and it wouldn't be wise to push them any further - so we left them then.