I still don't see what the big deal. The State of New Hampshire, owners of the recreation easement, condoned the closure of the land due to repeated abuses. This is no different than, say, closing a highway rest area because they are being used for drug deals. If anything, the fact that the state went to such extremes in closing this area should highlight the levels of abuse going on inside the area. (and I realize that the list of complaints goes beyond Trail Bandit).
In general, New Hampshire takes property owner rights very seriously. I feel like in this case, they decided to err on the side of caution when considering just how many rights the landowner retained after selling off the easement. Its consistant with the philosophy of New Hampshire in general, and overall I think that it was handled extremely well.
Here is my 2 cent impression of what happened. There were abuses of the land. The landowners complained. The state condoned the closing of the land. The state worked with the landowners to resolve some of the problem and establish new guidelines for future recreation use of the area. The land is re-opened to the public. Sounds like government working like it was intended to.