It's a tough call. I don't like police being on campus yet it
   enforces accountability for the whole population, students,
   teachers and administrators... theoretically. But there's
   abuses. We have cops on campuses here but their role seems to be
   that of "Here's a friendly cop", an attempt to make the police
   less scary and have an outside authority to turn to if there's a
   problem. But... I dunno. To me, it's like they just gave up on
   pretending that school wasn't a prison and just said, "Hey
   everybody, yeah, not only is our current architectural designs
   make modern schools look like prisons, but HEY! Here's the
   prison guards! Have fun for 12 years....