If a member, usually a new one, starts trying to control an event or a committee or otherwise breech the culture of collaboration, the leadership of ACG SF will hear about it quickly and move to educate that member about expectedbehavior.
Varadhan, New York University, for his work in probability theory, especially his work on large deviations from expected random behavior which has revolutionized this field of study during the second half of the 20th century, and become a cornerstone of both pure and applied probability.