According to a study released by Duke faculty, chaired by a law professor, the Duke LAX team makes up less than 1% of the student population, but members were responsible for 11% of reported campus problems last year -- many alcohol related.
You can hear the story here:
http://www.npr.org/templates/story/s...toryId=5376032
That obviously does not make them rapists, but does speak to the alleged culture of a seemingly out of control organization.