Its public land, first come first to use it....Imagine if I had a lot of time on my hands and went out and put 5 or 6 tree stands/ladders on one piece of public hunting land in my area....It would not be fair because most government land you can hunt in my area are some blocks consiting of 50-200 acres....Where is everyone that shows up supposed to hunt...Public land should not allow permanent blinds in the first place....portables only should be the law and taken down at the end of the day at least in my neck of the woods where the biggest parcel might be 200 acres....
If you do not want to have others hunting out of your tree stand go build it on private land......