The walkout started at 11 a.m., and attendees circled Tommy Trojan while chanting slogans.
The recent social probation, though harsh, must serve as a wake up call to Greek leaders.
The bigotry and hate that exists on the Internet today demands a response from students.
More than 20 USC students attended the talk on issues raised by the fraternity email.
Eight USC graduate students wrote and sent a petition to President C. L. Max Nikias.