The ratio of students to non-students reminds one of the free speech movement at Berkeley in the 1960s. The first great riot led to the arrest of some 950 miscreants. Students made up less than 50 of that total. The majority were local radicals, a large percentage of which were Red Diaper Babies from the East Coast.
That’s probably the same with this group. They need to investigate that and point it out. The ones who are students need to be required to pay back their portion of the damage before they can continue their education and those who are not students can either pay or work it off.