It is rude to park on someone else's property.
Jay is driving his friends to a festival downtown, and he has been looking for a parking place for the last 15 minutes.
Jay wants to park his car.
Jay drives until he sees someone leaving, and then he puts on his turn signal and parks in the empty space.
Jay parks alongside someone's yard, ignoring a sign that says the area is private property.
Jay's car is safe during the festival, and he is able to get home easily afterward.
Jay's car is towed by the homeowner, and he has to pay $100 to get it back.