From this study, Milgram made a number of observations about how familiar stranger relationships are maintained. He noted that the further removed familiar strangers were from their routine encounters, the more likely they would be to engage in interaction and break the familiar stranger relationship. But he also observed the opposite: that in routine settings, a person would be more likely to interact with a complete stranger than a familiar stranger as the complete stranger had no pre-existing interpersonal barriers to overcome. Finally, he noted that breaks in routines, such as health emergencies or natural disasters would cause familiar strangers to interact with each other.
