Does your phone have a camera on it? What if you decide to take out your phone and check an email, would you want what happened to the guy happen to you? "Don't take out your phone out of your pocket in a theater or other area where filming is prohibited."
Checking your email on your phone is OK (even though it is a dick move since you annoy others in the theater), but holding your phone up to the screen to record all 180 minutes of The Wolf of Wall Street is in fact not ok.
IE: Wearing a device on your face that is pointed to the movie screen that can possibly record the entire flick is not the same as your phone being out of your pocket for 20 seconds to read your latest text message.
It seems pretty evident that some people are going to be wearing computers on their faces, and all of these computers come with cameras. Bootlegs are always available (in terrible quality), anyway.
Most illegal things are always available / possible (drugs, weapons, theft..), the fact that they happen isn't a reason not to prevent them happening when possible. You can argue things shouldn't be illegal, but not that illegal things shouldn't be pursued based on the fact that they happen anyway.
Please don't light a bright back-lit screen in a theater for something like email. The focus break ruins the experience people pay the ticket price for. Emergencies only.
