Yikes. I've done the opposite. A fully qualified candidate was so satisfied in his competence that he was absolutely insufferable.
As he was completing the coding portion of his interview, I broached the topic of comments. "Nah, this is an interview, it doesn't matter."
This was back in 98 and he had a little personal website with a discussion board for his friends. He whined there about not getting the job, so I explained that it was his attitude, and not his skills, that made him a bad fit. His friends seemed to agree with me, that getting taken down a notch was a necessary step in his emotional growth.
