Earlier quoted context omitted.
The tech is not there, actually. Facial recognition is absolute garbage. It borders on being completely useless even in ideal circumstances. Airports might have a slight advantage since they have a list of people they expect to be present (people with upcoming flights) and such, but in my experience systems like what the TSA uses are obstinantly terrible. They most likely have a commercial product purchased from some…
Making it slightly easier is that they have multiple points where a person is matched with a name during their time in the airport. With that and good enough coverage they could make the recognition better with continuous tracking. Even without an explicit name attached to a person just knowing all the places a person has gone could be useful for flagging 'weird' behavior.
Do. Not. Want.