Since school culture can get a big makeover every year, any school can become like Middlebury, if these kind of illberal students are either not weeded out during admissions or self select away from the school. This is where the admissions office and alum interviewers play a very important role. So the administration and well wishers of the University have to be extra vigilant. I think there are enough kids in Chicago now who given a chance would behave Exactly like the Middlebury students. I have seen them give televised interviews explaining their position.
Zimmer and Nondorf really should be paying very close attention to how they pick the freshman class.