Movie piracy...

Many movies are pirated using a camerain theaters.Maybe some of you don't knowthat any camera "sees" infrared light.To test it, pick your camera and aima remote (your tv remote is ok) at it.You will see the infrared L.E.D. blinking.Well.. I was thinking...What if many infrared leds will be put behindthe projecting screen in theaters?The IR light won't be seen by people.But it will appear in recorded videos :)Obviously this could be defeated putting an IRfilter on the cam lenses.. but that's the road imho :)