In any theatre with stadium seating, so any of the AMC theatres in Toronto, or any of the Silver Cities, or any other modern construction, if you pull your phone out and hold it in your lap, it is in the lower peripheral vision of the person behind you. I am not speculating here. I have experienced this directly. I'm surprised that you haven't. [\QUOTE]
Bull shit. I may only go to a few movies a year (silvercity), but you cannot see into the lap of the person in front of you. Their head and the back of the seat is in your field of vision, not their lap. You may not be speculating, but you are imagining and that's quite possibly why I haven't experienced it.
Just to clarify, and to save a trip to the cinema, google images "amc stadium seating" and from any of the images, figure out how it's possible to see their cell unless they are holding it up.