I like this little exchange between Julian and Von. (Our Julian, you may not know, is a NY Times Crossword Fiend.)

Von: “Egotism, n: Doing the New York Times crossword puzzle with a pen.” - Ambrose Bierce."

Julian: But doing it in pencil is pusillanimous!

Von: People who write in pencil are pusillanimous. Unless they write in pencil in library books, in which case they are also reprehensible (but less so than people who write in library books in pen).