Drop the N from Northern Ireland?

Gearóid O Cairealláin is urging a form of civic action in which Nationalists drop the N from N Ireland when addressing letters. He’s probably right that the letters will get to their destination anyway – although I recall a story about a postcard addressed to Greenisland that went to Greenland – twice! However, the workers down at the Royal Mail won’t be too chuffed if people choose to dump the British postcodes as well!