The only thing wrong with the spraying of mace picture is they were not using sarin.
Simple:
Give them 15 min to vacate-if not
Cut power, water
Set up cell phone wifi jammer
Arrest everyone as they come out for trespassing and hold them accountable collectively for damages and costs of occupation
Expel all students from school
They should move to an African country where old black men run the institutions.
Simple
The cop needs to get down lower and blow that stuff right in their faces. Loser students.
While they are there instantly transform the college into a correctional facility, the stupid will not have to go far to do time