On my campus, de-pledging one sorority and joining another one was very, very rare. Maybe it was because there were only 3 NPC sororities on campus and slots weren't open often. Regardless of the reason, I only know of it happening once. My little sister depledged a few weeks before her initiation.
It came as a complete shock to me. Her reasoning wasn't because she didn't like the chapter, or even that she wanted to join another group. She was, quite frankly, brainwashed into de-pledging. She had recently become involved with an ultra-conservative religious group on campus (in fact, many people considered it to be a cult of sorts). The girls in the group convinced her that sororities were not the place for Christian women to be and that she would be 'corrupted' if she remained in our chapter, so she dropped out mainly due to peer pressure.
However, we remained friends (to this day) and she came to regret her decision a few months later. Unfortunately, she was too embarrassed to go through Rush and re-pledge my sorority, even though I encouraged her to do so. She ended up joining a local sorority a couple of years later and is still involved with the group as an alumna. However, she has mentioned several times how much she wishes she had stayed in DZ. I wish she had also. She would have been a wonderful asset to us.
