This is a cause women and responsible men should get together and fight for. The phenomenon's creeping into Indian cities as well along with rise in affluence and must be fought right in the face. Girls should be made more aware of their rights and men should know that it is not OK, not to be tolerated no matter what the "cool" crowd says.
This has to be conveyed not through a big brother or threatening approach - because that makes the act even more desired and the defense cannot really be implemented, plus can be misused. Rather, a social disapproval of such behavior needs to be spread - men need to hear from their peers that it's cheap and uncool to play dirty tricks and that it's way cooler to score fair and square. If we can succeed doing that in sports and exams, why not here?