I've heard that in some (but not all!) areas in the middle east, there's a stereotype held by some (but not all!) that western women are easy. From The Arab myth of western women by Khaled Diab: ...
Is it allowed to carry “a knife” or “a pepper spray” while traveling by road in the Schengen area as a woman?
Can a solo female traveler carry a knife or pepper spray to be able defend of herself when she is on the road or when hitchhiking, or it is illegal?
Why India is not safe for solo women is an article in The Telegraph (UK) describing one woman's issues with sexual harassment in India. Some of the information there describes a worse situation than ...
What class should a lone woman travel on a sleeper train to be safe at night?