Assuming the expectations and consequences were clearly communicated, and it sounds like they were (my D had to sign a physical form acknowledging similar), I’m fine with this.
“ Payments by the students will not be refundable, per guidelines of the N.U.in Program.”
That should get their attention and probably trigger some communications from parents of remaining students.
Cornell’s wishy-washy “double secret probation” do-nothing response to blatantly ignoring similar standards will just encourage continued violations.
https://www.nytimes.com/2020/09/02/nyregion/colleges-universities-covid-parties.html