A person has a reasonable expectation of privacy in a public restroom stall. State v. Ulmer ... see also State v. Bryant ... The Ulmer court gave the following rationale: The design of the restroom here affords a user more than a modicum of privacy by virtue of the partitions that separate the urinals. When a person steps up to a urinal, the partitions and the user's body create a space in which the user would quite expect to be free from even incidental observation, let alone from the exploring eyes of predatory restroom stalkers. (my emphasis)
Eve Fairbanks