Think about it. They already know who you are unless you anonymously purchased a "drop" phone. With either GPS or LBS, they know where the phone's been. It was with you, likely. You fell asleep where you live, so that's your address, resolved to about 1m most places. There's a MAC address on the phone, very difficult to spoof. There are two more IDs on the phone, one as your EIMI or equiv, and other that's buried in a firmware-reachable mem location.
You drove by the sniffing cell towers on your way into the airport. If WiFi was on, it sniffed that, too. Up against a database linking users to cell, another easily done link says: whoa there, Chuck, you're on the no-way-Jose list. We're going to ask you to step into our office after we get the nekkid picture of you.
Yeah, I'm giving them too much credit, partly in humor. Such a scenario isn't outside of the realm of real possibility. Why use so much technology when you can mark ropes? Next they'll be weighing passengers with rugs made out of load cells so they can balance plane weights before you ever get to the bankrupt pizza maker on the next concourse.