Articles relating to the concept of strangers, persons who are unknown to another person or group. Because of this unknown status, a stranger may be perceived as a threat until their identity and character can be ascertained. Not intended for biographical articles. The distrust of strangers has led to the concept of stranger danger (and the expression "don't talk to strangers"), wherein excessive emphasis is given to teaching children to fear strangers despite the most common sources of abduction or abuse being people known to the child.