1.
Imagine a person owns a nine square mile plot of swamp land.
Also imagine she has paved a private sidewalk diagonally through the land so that she does not have to walk around the prerimeter in order to reach one side from the opposite side.

Walking diagonally through the plot is four miles, which takes about an houre and twenty minutes. Walking around the perimeter is six miles, which takes about two hours.

Should otherwise well behaved passers by be able to walk on the private sidewalk without permission?
Why or why not?

2.
Imagine the Detroit Riverwalk is sold to an individual.
She is a private person and wants to enjoy the Riverwalk in solitude.
Should she be able to prevent locals from enjoying the scenery of the river through use of the private Riverwalk?