ORD doesn't have convenient exit lanes in terminal 1, if that's where it was; there's only really 1.
It's all in the process. They should identify themselves and the TSO should take them to the far end of the checkpoint (either near the dinosaur or at the other end, where you can walk to T2), and let them through in a discreet manner.
OTOH, just make them go through the checkpoint like everyone else, and when they beep, verify they are who they are supposed to be and let them get on their way. That way no one but people like us will know what is going on and the kettles wont get scared.