Maybe they need to do the Laser Show Policy. Here, before the Laser Show and announcement is made - "During the show, If we see a laser pointer, flashlight, cellphone, or lighter, we will immediately stop the show, point out the offender, and the show is over. The offender will then have to deal with all of you out in the parking lot." There was one drunk idiot that tested this during laser metallica...it took the police to save his ass out in the parking lot.