Who are behind the free speech crisis are the hooded and masked hooligans dressed in black who arrive at the even armed with weapons and primed to destroy property and assault others–they and whoever encourages and funds them. Their violence is what colleges are trying to prevent. Maybe a larger area around the venue needs to be cordoned off in advance, like they do for an event the President or VP is attending, and then do a security check including asking for student IDs. This way we can at least learn if the anarchists are students or outside instigators, and work from there on preventing their return.