It's hardly a new problem. A 707 landed at Northolt (aiming for Heathrow) in the sixties, and as a result NO (for Northolt) and LH (for London Heathrow) were painted in bloody great big letters on gasometers on the respective approaches. I think they only managed to get it out (Northolt is a pretty small airfield, and 707s had very poor takeoff performance) by taking out the seats and putting about a pint of fuel in.
More recently, and with a bigger potential for a big accident, a RyanAir flight (operated by EirJet, not that it matters) managed to land at an old army based five miles from Derry rather than, er, Derry. They were fucking lucky that the runway, wasn't occupied as it's now used for all sorts of other tasks. News story here, and for enthusiasts, the Air Accident report is an absolute corker.