Bringing the problem out into the open is an excellent idea. Another one is teaching women how to stay out of situations in which they would be vulnerable. Support groups and other counseling could also be helpful. But the most effective way to stop date rape is for parents to teach their sons not to do it. Young men need to know that they don't have a license to force sex on an unwilling woman, or on a woman who has had too much to drink.
Date rape is never the woman's fault.
The sooner both sexes learn that, the better.