I'm fine with them doing what they can to put a stop to shady activities, but the idea of slowing down the main ticket lines to take a pic of all these people (on high capacity days anyway) has me scratching my head a little. Would it not make more sense to have separate turnstiles for the multi-day users with cameras affixed to them and just have some regular entrances set up for everyone else?
For instance, the exit turnstiles near the newsstand that I barely ever see used. Use those as the exits for the day and use the current exit turnstiles as the Multi-day pass entrance(s). That will leave the regularly used entrances relatively free-flowing.