Communal changing rooms pose less of a risk of theft than fitting rooms, because there is not total privacy. In particular, the perpetrator of a crime would not know whether or not other users might be undercover police or security guards. Many modern changing rooms often have labyrinth-style entrances that have no door, so that people outside cannot see in, but security can walk in at any time without the sound of an opening door alerting persons inside. Washrooms in which changing clothes is merely a secondary purpose often also have such labyrinth openings. Many washrooms have security cameras in the main area with a view of the sinks and the urinals from a viewing angle that would only show the back of a user. However, when a washroom is located near a fountain, wading pool, or the like, and is likely to be used for changing clothes, some believe that washroom surveillance cameras would be a violation of privacy.