> Although I've heard several times that they're interested in the cellphone jamming

Doctors go to the movies, too.

Think about this: A doctor is on-call, meaning that at any moment they might be called in to come to the hospital to save your life.

They have a cell phone which is the only way they can be reached when they settle in to watch a film in the local multiplex. The same multiplex that jammed cell phones without telling anyone (because multiplexes hire idiots).

You come in to the hospital and need the doctor immediately. So they are called.

And the doctor's cell is dead.

And so are you.

(The ensuing lawsuit will totally bring you back to life.)