The definition of private property as compared to public property can be more fluid than people realize. One term of law that people in New Jersey might have only a faint understanding of is easements. An easement is a piece of property that is used by others who do not own it, usually to travel from one place to another.
New Jersey residents might not like the Mets or the Toronto Blue Jays, but what recently happened to a fan at a baseball game between those teams impacts sports fans everywhere. Why? Because sports fans pay money to watch a game and have a good time. They should be reasonably safe while on the premises of a sports arena.