You know. This almost sounds like a mirror-universe sort of thing. Instead of relatively humane phasers and other weapons, the security force is comprised of various squads or packs of vicous animals that tear apart the intruders. Very messy. Maybe they could flood a section and send in meat-eating sharks or piranha fish. And switch the gravity off. How about a security protocol where the gravity is rapidly switched from zero gravity to ten times gravity. That would look funny as hell.