reading the newest threads on the zombie post about electrifying the keys made me think of my work (science museum). We have a number of rules people think they don't have to follow. We joke about getting a stakeout spot. If we see someone breaking a rule, we blow a whistle and ask them to stop or else we get out the nerf ball gun. If they don't stop, POW right in the back of the head. Maybe Disney could do this as well.
We have also talked about electrifying some of the exhibits as well.