A Saudia flight from Jeddah to Dammam was delayed because, seriously, a passenger demanded to know why a female flight attendant was permitted to travel without a male family member accompanying her. He then insisted that all unaccompanied female passengers be removed from the plane.
To Saudia’s credit (?) they had security remove the man from the flight and they departed without further incident.
According to the linked article, every woman in Saudi Arabia is required to have a male guardian (usually a family member) while traveling.