Cooper became a bit of a folk hero; wikipedia has a whole separate page about his appearances in popular culture. There is even a song, the "Ballad of D.B. Cooper," that received some radio attention, at least in the Pacific Northwest. And, particularly in the wake of 9/11, his antics do have an innocence to them. No one was hurt, he didn't take all that much money, and he was pushing no political or religious agenda other than the enrichment of D.B. Cooper. There are worse things.
I have a very slight personal connection to old D.B. Cooper as my father, who had just been working at the Seattle-Tacoma airport for a year or so at the time of the hijacking, was called out to the airport that night, though as I recall he ended up doing nothing other than standing around and watching the proceedings.
And, what are we to make of the Daily Mail calling it the Tacoma International Airport? Not hardly. At the time, Tacoma was best known locally for the awful smell that emitted from a large smelter.
Hat tip: Charlie Brown