Today's "people's daily camera" has an article about this. Here is just one snippet:
The Kirlins said they understood the issue was that their neighbors wanted continued access through the property to their backyard. Don Kirlin said he offered to give the couple 5 feet of his land from the existing fence line to accommodate the concern, but his offer was rejected. He said he now thinks there was an ulterior motive for the lawsuit.Having 39 years experience with Boulderites, I'm betting he is correct."I believe that their intent was not to have access to their backyard, as they claim, but actually to make my lot un-buildable so they would be able to maintain their view of the southwest."
I think you would be safe in that bet.
Property rights in Boulder, CO, is like religious freedom in Saudi Arabia.