For a foreign woman it is never a good idea to respond to men who approach her. The appropriate behavior is cold silence and indifference. Avoid being a target Walk fast all the time. Your watch might be someone's 6 month salary. Dress as humbly as possible.
Accomplices are often women and children.
If attacked Move slowly, time is on your side. Use violence only if the attacker is under the influence of drugs or alcohol. In most countries theft is an accident of life and police will not even make an effort to investigate, but murder, especially of a foreigner, is a major event. Unless you do something really weird, most of the time a thief who is after your wallet or luggage has any interest in hurting you. When driving This does not apply solely to Third World countries but also here domestically.