Subject: Yale Policy
"Yale personnel issued final warnings that protesters in an encampment set up on Sunday afternoon on Yale’s Cross Campus must end the encampment or face discipline including suspension for violating university rules and arrest for trespassing. All the protesters chose to leave the encampment, and the university is in the process of clearing tents and other items from the area."

Those Yale kids ain't stupid.
They made their statement.
They don't want to risk getting a degree from Yale.