Since JoeW brought up an interesting point on "losing" people, I'm going OT on the crutches from OP. My grandmother was "lost" in Chicago. My uncle had paid extra (I think similar to an UM fee, this was several years ago) because she had dementia and they were to ensure she made it from gate to gate. Didn't happen - she was lost and it took that day to find her; too late to make her connection and had to spend the night in Chicago and flew out the next day. My uncle learned the lesson not to ever do that again.
My dad has alzheimers and it has gotten worse. He recently flew alone and I routed him through Houston so that I could go to the airport, pick him up at the gate (President's Club security pass) and wait with him until his flight, which I then ensured he got on. I had booked a trip a few months ago for him, which my mom will now have to fly with him because in no way should he be flying alone and I can't expect the airlines to follow through on a connection.
Back to topic, I understand the issue of keeping track of a pax, but not quite sure how I feel about a "disabled" lounge. There has to be a better answer, maybe RFID