Because as Carlton says, it's just tedious to keep going over it when it has been covered in such depth many times before.
It's now mentioned every time just so that people can say "oh look how brave I am, I won't let the PC brigade muzzle me. I'm going to type Nigger even though everyone who reads this thread knows that was the dog's name, the code word and how it's now been changed"
By repeatedly covering the same ground you run the risk of being as boring as BEagle who prints the same tired old picture of a VC10 and Bear any time there is even remotely any connection with QRA.