They are vulnerable to simplistic answers. As a chaplain I have listened as students have spoken of roommates and friends who have become increasingly isolated form them. The friend becomes the target for recruitment and sometimes of accusation. Students who are trying to leave a group or who have left may be suffering harassment or persistent censure. Many are confused, afraid to trust, and have difficulty thinking critically.
Parents call and ask about groups on campus.
Their son or daughter has become remote. Parents and family are rejected or held to be incomplete or hostile. Friends are disappearing. Future plans are jeopardized or radically altered by the demands of the group. The university needs to be supported as it addresses these issues.