Despite warnings that there was no undo when selecting a username on FaceBook, the ever-shifty web site has abandoned its earlier edict and is now allowing anybody with a sense of humor to go back and ‘fix’ their previous registration.

Warning, FaceBook says you only have one more chance. They mean it. Only one more chance.

Realistically FaceBook is probably just trying to scare you into taking a name that’s a little less absurd than “rickroll” or “jackbauercouldwhoopchucknorris”