Trespasser

Causing noise, light, odors, or smoke to enter the land of another is not a trespass, but is instead a different tort, nuisance.

[citation needed] A constructive trespass occurs when a person who has permission to be on the land overstays their welcome.

A person who stays in a business after its closing time, or who goes to a dinner party but refuses to leave long after the other guests have gone home, is a trespasser despite their initially proper presence.

In some jurisdictions an adult trespasser who is injured while on a defendant's property cannot sue under a theory of strict liability, even if the landowner was engaged in ultrahazardous activities, such as the keeping of wild animals, or the use of explosives.

Many jurisdictions within the United States have passed statutes to modify or clarify the common law duties owed by a property owner to a trespasser (for example, by explicitly permitting the property owner to use deadly force to expel trespassers).