JFK was doing that on the exit from the Customs area to the DL concourse 2 months ago.

Really annoying given the multiple security checks leaving IST (X-Ray/WTMD to get in terminal, interrogation at check-in, WTMD/x-ray entering gate followed by a HHMD check 5 feet later, then a grope 15 feet later, then a swab of the bag, then another inspection of BP and passport by security personnel who recorded the information and forced you to sign a document).