Sorority pledge misbehavior

[musicmom]

My daughter pledged this year at one of the big SEC schools . Evidently the party girls in her pledge class are defying the actives, and partying (with alcohol) outside of organized swaps and have been caught several times. My daughter is tired of the group punishment and being yelled at every week by the president and pledge trainer. She and her friends are not part of this group. I've been able to talk her into staying so far, but may not in the long haul. Her chapter has a great reputation on campus, and I understand they want to keep it that way, but my daughter is unhappy with the mood in the house.
Her pledge social chair is intentionally antagonizing the chapter president. Are chapters not able to de-pledge girls that are risk management issues?