Realistically, in future they will have to resort to scanners to detect equipment and put them in a locker until you reclaim it, and optical/timing tricks to degrade pirated footage. I posted some techniques for this over at dvinfo to talk about it, but as usual that crowd is pretty inept to this level.
I worry more that I might forget I am carrying a pocket camera, and the theatre wants to compensate it. As it is, I forget to turn my mobile off until I am in there, and they watch to see if you are doing something.



