This is strange. Isn't the travel they are forcing quite possibly a cure worse than the disease? And are they really expecting students (many of them international) to go home within a week, seeing that flights are getting cancelled all over the place?
They do seem to have reasonable exceptions for students who "have concerns that they would not be allowed to return to MIT due to visa issues" or who "will have difficulty returning to their home country if it has been hard-hit by COVID-19" or who "do not have a home to go to, or for whom going home would be unsafe given the circumstances of their home country or homelife". I'm wondering how reasonably these will be implemented, though.
In what way are dorms worse than personal homes for diseases anyway? Are they not trusting their students to prepare their own food? Why don't they just close the dining halls instead?