apparently in 1994, David Carson was art directing an issue of Ray Gun magazine. he found one of the interviews he was designing for (with Bryan Ferry) so boring, that he typeset the entire thing in Zapf Dingbats.
if you're not familiar, Zapf Dingbats is an iconographic font with no legible letters.
one of my favourite quotes is from Carson, about this piece: "Don't mistake legibility for communication."