I've seen the mini lightsaber ushers at some theaters for several years now. They're making sure nobody is recording the movie. I doubt they really need to do it three times or more. Who's going to whip out a camcorder ninety minutes in?
The theaters where I don't see those guys are presumably spying on the audience with infrared cameras, so better not scratch yourself, or pick your nose in the dark anymore.
In bygone days, I used to see ushers with flashlights helping people, (usually old folks) find their seats once the lights went down and the trailers started.
How they're going to spot those tiny spy cameras built into hats, buttons, and eyeglasses remains to be seen...