In the full article it sounds like they had done exactly that – sent an email warning people that Beta was an unsavory dangerous place and discouraging people from going. Then the new rape case happened anyway. Though the article points out the previous email had been sent before the victim had come to campus as a new freshman and perhaps they could have just resent the email annually. Even that email drew angry responses though. The article also acknowledged that the no congregating ban was overreaching. But the counter protests didn’t just focus on that overreach, they specifically were chanting “free Beta.” Again, I think there is a stubborn personal liberty thing at play, at least with some – the equivalent of the “I hate what you’re saying but I’ll defend to the death you’re right to say it.” Some students who have less than zero interest in the frats see banning them as an attack on personal liberty and letting students make their own decisions, even if poor ones. You could easily see people protesting the frat and any efforts to kill the frat, as long as it gets no support from the school, at the same time.