Deere aren't over run here in the USA, Americans just like to shoot any and everything. We live out in the middle of nothing, tons of open prairie, wooded areas, farm ground, ponds every mile. I see a deer maybe once a week, however, the hunters are always thick around here, they all come down form different states, drive huge lifted 4x4 pickups that cost more then our house, they also bring down BRAND NEW utility vehicles and drive all over the place. All of these idiots have way to much money and enjoy shooting poor animals that aren't doing anyone any harm.
AAAHHHH, the U.S.A! 
I'm afraid we have a very serious difference of opinion. A friend of the family has hit 4 deer in the last year. I've been lucky with close calls numbering higher than that. It's a rare trip home in the evening when we don't see at least one deer in the fields near the road
As for the "Animals that aren't doing anyone harm" "statement", loss of crops, increase in deer tick exposure ( lyme disease, a very aggressive form of encephalitis, and a new disease with malaria like symptoms) is increasing. Also, PA has seen a nearly 10% increase in deer collisions in the last couple years. I believe we are number two or three nationally now. Unfortunately, the loss of human life has gone up as well. PA is not alone in these troubles. Just Googling "killed in collision with deer" will give hits from coast to coast and beyond.
Any increase in herd size can logically cause predators to become more common. Where there is prey, there will be animals to eat it. This will lead to increased human/predator interaction. I have three children and I am worried about the coyote explosion of late... We dont let the youngest go near the woods without an adult, have taught the older two to be wary. If the herds continue to grow, it's a real possibility that there will be larger canine predators and possibly even big cats to follow.
I am sorry that your opinions of hunters are less than favorable. That may be because of the caliber of hunter that frequents your area, but I take umbrage with the your generality. Please do not assume that all hunters are idiots. Wildlife management is a serious field of study that encompasses many sciences and measured practices. One of them is harvesting.