High Fence for the Neighbor

The adjoining land owner to our property that we hunt is planning on putting up a high fence on his property. He is put off by the fact that he has bedding area and we have food source. He has stated several times "we need to stop shooting his deer" when they come onto us. That's a different issue all together so lets not worry about how stupid that is. The facts are that this guy does not hunt and does not plan to hunt the 600 hundred acres. He is just one of those unhappy people with a bunch of money and a sense of entitlement. He has 600 hundred acres and plans to enclose all of it. I can think of several issues he is going to run into with this plan, but what does the OB think?