I agree that it's good practice to make it easier for readers and identify the more obscure airport codes, but obscurity tends to be in the eye of the beholder. It's pretty easy to click on the airport code lookup words at the bottom of every FT page. In fact, the two symbol airline codes can be harder to check and again IMO the more obscure ones should be identified.

What I find annoying is when people assume that everyone has memorized an airline's schedule and flight numbers. Posts like "upgrade chances on DL 2883?" are annoying this way in that checking would require going to the airline's website and checking flight status (to find city pair and aircraft type), assuming that schedules and flight numbers will be the same today as when the person is traveling. I know very few flight numbers, and they're generally the ones with unusual numbers rather than the flights I take most often: DL1001 (KE operated codeshare JFK-ICN) and DL 101/110 (ATL-EZE and vv service, but don't ask me which number goes north and which one south).