But this isn't like putting a sign in front of a cliff which says, "please don't step right up to the edge of the cliff," and then blaming the student who plunged to his death for failing to obey the sign. Though that's the story university administrators want to tell.(%$# mine)
The student who steps up to the edge of the cliff, idiot as he may be, is tethered to 5 more students, who are tethered to 5 more students, who are tethered to 5 more students...
That some number of students are dipsh%$s was known by the responsible adults making these plans. That each student dipsh%$ is going to infect some number of other "blameless" students is regularly ignored.
—Atrios, aka Duncan Black
He is completely right. In the context of a residential educational institution, it is impossible to make ALL the students behave responsibly.
Administrators know this, and so the outbreaks are a direct result of their callously disregard for the safety of their students, because they wanted the tuition and fee money.