Originally Posted by
6P&E
or the name of the airport to create a geographical entity that doesn't really exist-- Raleigh-Durham is an airport, not a city in NC, but many people will say things like "My brother moved to Raleigh-Durham last year." I just wonder where in the airport he lives

I live in RDU (and yes, I mean the general area, not the airport). Lots of people down here refer to the whole area as Raleigh-Durham. It's an easy way to refer to the area without naming the specific town that someone from outside the area has likely never heard of.
I'm one of the many on FT who use airport codes to refer to entire geographies. Sorry, but I can't be bothered to get upset about little things and it saves a ton of typing, especially on the phone!