I believe that a worker was killed by Batman a few years ago. He was in that same restricted area and was hit by the ride as well.
Edit: I was right.
http://www.rideaccidents.com/2002.html#may26
"(Sunday, May 26, 2002) - At Six Flags Over Georgia, a 56-year-old employee was struck by the leg of a passenger on the Batman The Ride roller coaster and killed. Park officials say that the man was in a restricted area underneath the track of the ride when the accident happened. The rider, who was seated in the ride's front car, sustained a leg injury and was treated at a local hospital. There were 27 other people on board the ride at the time of the accident, none of whom were injured."
Apparently Batman doesn't like people to be in its bowels.