One of the negatives about joining a fraternity or sorority is the process that most go through to become part of the Greek life. Some sororities and fraternities have anti- hazing rules because of the controversy it has caused through the years. However many modern Greeks don't believe in "Paper" which in the Greek life community means they just signed a few papers and don't go through the hazing process. To many that's an insult because they didn't "Earn their Letters" therefore they should not have the right to represent the fraternity or sorority.
This article I found explains a little about 2 cases that were brought about to inform the public of some of the things these pledges go through.
http://abcnews.go.com/Health/Wellness/sorority-hazing-increasingly-violent-disturbing-college-campus/story?id=9798604