If you watch the linked video, you can see one of the screeners come to the edge of the wall of the screening area and tell someone to hold still. I'd say this is more proof of them moving way beyond the scope of their authority and moving towards that of a LEO. She actually reminded me more of a school crossing guard talking to a parent coming to pick up their child. Maybe we should buy them some of those yellow plastic sashes to go with the blue uniform.